Add debugging tools for WAF configuration and anomaly threshold testing

- Implemented debug_test_results.py to evaluate WAF test results with detailed request/response logging.
- Created debug_waf.go for logging request details and dumping WAF rules to a file.
- Developed debug_waf.py to extract WAF configuration from Caddy Admin API and test WAF rules with sample requests.
- Added sample_rules.json containing test rules for WAF evaluation.
- Configured test.caddyfile for local testing of WAF with defined rules and logging.
- Enhanced test_anomalythreshold.py to validate anomaly threshold behavior with comprehensive test cases and detailed output.
This commit is contained in:
fabriziosalmi
2025-04-30 11:19:17 +02:00
parent 533020d5e6
commit fe84fbb5c5
14 changed files with 1285 additions and 84 deletions

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@@ -123,6 +123,14 @@ func (m *Middleware) Provision(ctx caddy.Context) error {
zap.Int("anomaly_threshold", m.AnomalyThreshold),
)
// ADDED: Set default anomaly threshold if not provided or invalid
if m.AnomalyThreshold <= 0 {
m.AnomalyThreshold = 20 // Use a reasonable default value
m.logger.Info("Using default anomaly threshold", zap.Int("anomaly_threshold", m.AnomalyThreshold))
} else {
m.logger.Info("Using configured anomaly threshold", zap.Int("anomaly_threshold", m.AnomalyThreshold))
}
// Start the asynchronous logging worker
m.StartLogWorker()

269
check_waf_config.py Normal file
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@@ -0,0 +1,269 @@
#!/usr/bin/env python3
import requests
import json
import sys
import re
import argparse
from termcolor import colored
def setup_args():
parser = argparse.ArgumentParser(description='Check WAF configuration for testing')
parser.add_argument('--url', default='http://localhost:8080', help='URL to test (default: http://localhost:8080)')
parser.add_argument('--config-endpoint', default='', help='Endpoint for accessing WAF configuration (if available)')
parser.add_argument('--rules-file', default='sample_rules.json', help='Path to rules file (default: sample_rules.json)')
return parser.parse_args()
def load_rules_from_file(file_path):
"""Load rules from a JSON file, handling comments if present."""
try:
# Read the file content
with open(file_path, 'r') as f:
content = f.read()
# Remove JavaScript-style comments if present
content = re.sub(r'//.*?\n', '\n', content) # Remove single-line comments
content = re.sub(r'/\*.*?\*/', '', content, flags=re.DOTALL) # Remove multi-line comments
# Parse JSON
rules = json.loads(content)
print(colored(f"Loaded {len(rules)} rules from {file_path}", "green"))
return rules
except json.JSONDecodeError as e:
print(colored(f"Error parsing JSON from {file_path}: {str(e)}", "red"))
print(colored("Make sure the file is valid JSON. JavaScript-style comments are stripped automatically.", "yellow"))
return []
except Exception as e:
print(colored(f"Error loading rules from {file_path}: {str(e)}", "red"))
return []
def check_rule_coverage(rules, threshold=5):
"""Check if rules cover all test cases needed for anomaly threshold test."""
required_tests = {
"low_score_test": False,
"param1_score2": False,
"param2_score2": False,
"param1_score3": False,
"param2_score3": False,
"block_true": False,
"increment_score1": False,
"increment_score2": False,
"increment_score3": False
}
# Store rule scores for tests
rule_scores = {
"low_score_test": 0,
"param1_score2": 0,
"param2_score2": 0,
"param1_score3": 0,
"param2_score3": 0,
"increment_score1": 0,
"increment_score2": 0,
"increment_score3": 0
}
block_rule_mode = None
for rule in rules:
# Check for low score test rule
if 'targets' in rule and 'URL_PARAM:test' in rule['targets'] and 'pattern' in rule and 'low_score_test' in rule['pattern']:
required_tests["low_score_test"] = True
print(colored(f"✓ Found rule for test=low_score_test (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
rule_scores["low_score_test"] = rule.get('score', 0)
print(colored(f" Score: {rule['score']}", "yellow"))
# Check for param1 score2
if 'targets' in rule and 'URL_PARAM:param1' in rule['targets'] and 'pattern' in rule and 'score2' in rule['pattern']:
required_tests["param1_score2"] = True
print(colored(f"✓ Found rule for param1=score2 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
rule_scores["param1_score2"] = rule.get('score', 0)
print(colored(f" Score: {rule['score']}", "yellow"))
# Check for param2 score2
if 'targets' in rule and 'URL_PARAM:param2' in rule['targets'] and 'pattern' in rule and 'score2' in rule['pattern']:
required_tests["param2_score2"] = True
print(colored(f"✓ Found rule for param2=score2 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
rule_scores["param2_score2"] = rule.get('score', 0)
print(colored(f" Score: {rule['score']}", "yellow"))
# Check for param1 score3
if 'targets' in rule and 'URL_PARAM:param1' in rule['targets'] and 'pattern' in rule and 'score3' in rule['pattern']:
required_tests["param1_score3"] = True
print(colored(f"✓ Found rule for param1=score3 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
rule_scores["param1_score3"] = rule.get('score', 0)
print(colored(f" Score: {rule['score']}", "yellow"))
# Check for param2 score3
if 'targets' in rule and 'URL_PARAM:param2' in rule['targets'] and 'pattern' in rule and 'score3' in rule['pattern']:
required_tests["param2_score3"] = True
print(colored(f"✓ Found rule for param2=score3 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
rule_scores["param2_score3"] = rule.get('score', 0)
print(colored(f" Score: {rule['score']}", "yellow"))
# Check for block action
if 'targets' in rule and 'URL_PARAM:block' in rule['targets'] and 'pattern' in rule and 'true' in rule['pattern']:
required_tests["block_true"] = True
block_rule_mode = rule.get('mode', 'unknown')
print(colored(f"✓ Found rule for block=true (ID: {rule.get('id', 'unknown')})", "green"))
print(colored(f" Action: {block_rule_mode}", "yellow"))
if block_rule_mode != 'block':
print(colored(" WARNING: This rule should have mode='block'", "red"))
# Check for increment score rules
if 'targets' in rule and 'URL_PARAM:increment' in rule['targets']:
if 'pattern' in rule and 'score1' in rule['pattern']:
required_tests["increment_score1"] = True
rule_scores["increment_score1"] = rule.get('score', 0)
print(colored(f"✓ Found rule for increment=score1 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
print(colored(f" Score: {rule['score']}", "yellow"))
if 'pattern' in rule and 'score2' in rule['pattern']:
required_tests["increment_score2"] = True
rule_scores["increment_score2"] = rule.get('score', 0)
print(colored(f"✓ Found rule for increment=score2 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
print(colored(f" Score: {rule['score']}", "yellow"))
if 'pattern' in rule and 'score3' in rule['pattern']:
required_tests["increment_score3"] = True
rule_scores["increment_score3"] = rule.get('score', 0)
print(colored(f"✓ Found rule for increment=score3 (ID: {rule.get('id', 'unknown')})", "green"))
if 'score' in rule:
print(colored(f" Score: {rule['score']}", "yellow"))
# Check test coverage
missing_tests = [test.replace('_', '=') for test, found in required_tests.items() if not found]
if missing_tests:
print(colored(f"\n⚠ Missing rules for: {', '.join(missing_tests)}", "red"))
else:
print(colored("\n✓ All required test rules are present!", "green"))
# Validate expected scores for key test combinations
print(colored("\nCalculated Scores for Key Test Combinations:", "cyan"))
# Test 2: Below threshold
test2_score = rule_scores["param1_score2"] + rule_scores["param2_score2"]
test2_should_block = test2_score >= threshold
if required_tests["param1_score2"] and required_tests["param2_score2"]:
print(colored(f"Test 2 - param1=score2&param2=score2: Score = {test2_score}", "yellow"))
print(colored(f" Threshold: {threshold}, Should Block: {'Yes' if test2_should_block else 'No'}",
"red" if test2_should_block else "green"))
if test2_should_block:
print(colored(" WARNING: This test should pass (not block) but the score may trigger blocking", "red"))
else:
print(colored("Test 2 - param1=score2&param2=score2: Cannot calculate - missing rules", "red"))
# Test 3: Exceeds threshold
test3_score = rule_scores["param1_score3"] + rule_scores["param2_score3"]
test3_should_block = test3_score >= threshold
if required_tests["param1_score3"] and required_tests["param2_score3"]:
print(colored(f"Test 3 - param1=score3&param2=score3: Score = {test3_score}", "yellow"))
print(colored(f" Threshold: {threshold}, Should Block: {'Yes' if test3_should_block else 'No'}",
"green" if test3_should_block else "red"))
if not test3_should_block:
print(colored(" WARNING: This test should be blocked but the score is below threshold", "red"))
else:
print(colored("Test 3 - param1=score3&param2=score3: Cannot calculate - missing rules", "red"))
# Test 4: Block action
if required_tests["block_true"]:
block_should_work = block_rule_mode == 'block'
print(colored(f"Test 4 - block=true: Mode = {block_rule_mode}", "yellow"))
print(colored(f" Should Block: {'Yes' if block_should_work else 'No'}",
"green" if block_should_work else "red"))
if not block_should_work:
print(colored(" WARNING: This rule should have mode='block' to properly test blocking", "red"))
else:
print(colored("Test 4 - block=true: Cannot evaluate - missing rule", "red"))
return required_tests, missing_tests, {
"test2_score": test2_score if required_tests["param1_score2"] and required_tests["param2_score2"] else None,
"test3_score": test3_score if required_tests["param1_score3"] and required_tests["param2_score3"] else None,
"test2_should_block": test2_should_block if required_tests["param1_score2"] and required_tests["param2_score2"] else None,
"test3_should_block": test3_should_block if required_tests["param1_score3"] and required_tests["param2_score3"] else None,
"block_should_work": block_rule_mode == 'block' if required_tests["block_true"] else None
}
def check_waf_active(url):
"""Check if the WAF is active by attempting to trigger a basic rule."""
block_payload = {'block': 'true'}
try:
print(colored(f"\nSending test request to {url} with block=true", "blue"))
response = requests.get(url, params=block_payload, timeout=5)
if response.status_code == 403:
print(colored("✓ WAF appears to be active (blocked request as expected)", "green"))
return True
else:
print(colored(f"⚠ WAF might not be active - received status {response.status_code} instead of 403", "red"))
print(colored("Check your WAF configuration and make sure blocking is enabled", "yellow"))
return False
except requests.exceptions.RequestException as e:
print(colored(f"Error checking WAF: {str(e)}", "red"))
return False
def main():
args = setup_args()
base_url = args.url
rules_file = args.rules_file
print(colored("WAF Configuration Checker", "cyan"))
print(colored(f"Target URL: {base_url}", "yellow"))
print(colored(f"Rules file: {rules_file}", "yellow"))
# Check server connectivity
try:
response = requests.get(base_url, timeout=2)
print(colored(f"✓ Server is reachable at {base_url}", "green"))
except requests.exceptions.RequestException:
print(colored(f"⚠ Cannot reach server at {base_url}", "red"))
print(colored("Make sure Caddy is running with your WAF configuration.", "yellow"))
sys.exit(1)
# Load and check rules
rules = load_rules_from_file(rules_file)
if rules:
required_tests, missing_tests, test_scores = check_rule_coverage(rules)
print(colored("\nExpected Test Results Based on Rules:", "cyan"))
if test_scores["test2_should_block"] is not None:
status = "FAIL (should block)" if test_scores["test2_should_block"] else "PASS (should allow)"
color = "red" if test_scores["test2_should_block"] else "green"
print(colored(f"Test 2 (Below threshold): {status}", color))
if test_scores["test3_should_block"] is not None:
status = "PASS (should block)" if test_scores["test3_should_block"] else "FAIL (should allow)"
color = "green" if test_scores["test3_should_block"] else "red"
print(colored(f"Test 3 (Exceed threshold): {status}", color))
if test_scores["block_should_work"] is not None:
status = "PASS (should block)" if test_scores["block_should_work"] else "FAIL (won't block)"
color = "green" if test_scores["block_should_work"] else "red"
print(colored(f"Test 4 (Block action): {status}", color))
# Only check WAF if we have the necessary rules
if required_tests["block_true"]:
print(colored("\nVerifying WAF is active...", "cyan"))
check_waf_active(base_url)
# Provide recommendations
if missing_tests:
print(colored("\nRecommendations:", "cyan"))
print(colored("Add the missing rules to your configuration to run all tests successfully.", "yellow"))
print(colored("\nConfiguration check complete.", "cyan"))
else:
print(colored("\nCould not load rules for verification.", "red"))
if __name__ == "__main__":
main()

143
debug_test_results.py Normal file
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@@ -0,0 +1,143 @@
#!/usr/bin/env python3
import requests
import json
import sys
import argparse
from termcolor import colored
def setup_args():
parser = argparse.ArgumentParser(description='Debug WAF test result evaluation')
parser.add_argument('--url', default='http://localhost:8080', help='URL to test (default: http://localhost:8080)')
parser.add_argument('--detailed', action='store_true', help='Show detailed request/response information')
return parser.parse_args()
def debug_response_evaluation(url, test_name, payload, expected_status):
"""Send a request and debug the response evaluation logic."""
print(colored(f"\n=== Debugging {test_name} ===", "cyan"))
print(colored(f"URL: {url}", "yellow"))
print(colored(f"Payload: {payload}", "yellow"))
print(colored(f"Expected status: {expected_status}", "yellow"))
try:
# Send the request
print(colored("\nSending request...", "blue"))
response = requests.get(
url,
params=payload,
headers={'User-Agent': 'WAF-Threshold-Test-Debug/1.0'},
timeout=5
)
# Get the status code
status = response.status_code
print(colored(f"Received status code: {status}", "green"))
# Check if it matches expected
match = status == expected_status
match_str = "✓ MATCH" if match else "✗ MISMATCH"
match_color = "green" if match else "red"
print(colored(f"Status evaluation: {match_str}", match_color))
# Show response details
print(colored("\nResponse details:", "cyan"))
print(colored(f"Status code: {status}", "yellow"))
print(colored(f"Response body: {response.text[:100]}...", "yellow") if len(response.text) > 100 else colored(f"Response body: {response.text}", "yellow"))
# Show evaluation details
print(colored("\nEvaluation details:", "cyan"))
print(colored(f"Python expression: response.status_code == {expected_status}", "yellow"))
print(colored(f"Evaluation result: {response.status_code} == {expected_status} = {response.status_code == expected_status}", "yellow"))
# Boolean check
bool_result = bool(response and response.status_code == expected_status)
print(colored(f"Boolean check: bool(response and response.status_code == {expected_status}) = {bool_result}", "yellow"))
# Return result for summary
return {
"test_name": test_name,
"expected": expected_status,
"actual": status,
"match": match,
"bool_check": bool_result
}
except requests.exceptions.RequestException as e:
print(colored(f"Error sending request: {str(e)}", "red"))
return {
"test_name": test_name,
"error": str(e),
"match": False,
"bool_check": False
}
def run_all_tests(url):
"""Run all the tests from the anomaly threshold test script and debug the results."""
print(colored("Running all tests and debugging evaluation logic...", "cyan"))
# Define all test cases
test_cases = [
{"name": "Test 1 (Low score)", "payload": {"test": "low_score_test"}, "expected": 200},
{"name": "Test 2 (Below threshold)", "payload": {"param1": "score2", "param2": "score2"}, "expected": 200},
{"name": "Test 3 (Exceed threshold)", "payload": {"param1": "score3", "param2": "score3"}, "expected": 403},
{"name": "Test 4 (Block action)", "payload": {"block": "true"}, "expected": 403},
{"name": "Test 5a (Increment 1)", "payload": {"increment": "score1"}, "expected": 200},
{"name": "Test 5b (Increment 2)", "payload": {"increment": "score2"}, "expected": 200},
{"name": "Test 5c (Increment 3)", "payload": {"increment": "score3"}, "expected": 200},
]
# Run each test
results = []
for test in test_cases:
result = debug_response_evaluation(url, test["name"], test["payload"], test["expected"])
results.append(result)
# Show summary
print(colored("\n=== Test Evaluation Summary ===", "cyan"))
for result in results:
if "error" in result:
print(colored(f"{result['test_name']}: Error - {result['error']}", "red"))
else:
status = "PASS" if result["match"] else "FAIL"
color = "green" if result["match"] else "red"
print(colored(f"{result['test_name']}: {status} (Expected: {result['expected']}, Actual: {result['actual']})", color))
print(colored(f" Boolean evaluation: {result['bool_check']}", "yellow"))
# Check for any issues with Tests 3 and 4
test3 = next((r for r in results if r["test_name"] == "Test 3 (Exceed threshold)"), None)
test4 = next((r for r in results if r["test_name"] == "Test 4 (Block action)"), None)
if test3 and test4:
if test3["match"] and not test3["bool_check"]:
print(colored("\nISSUE DETECTED: Test 3 status matches but boolean evaluation fails!", "red"))
print(colored("This explains why the test incorrectly shows as failed.", "red"))
if test4["match"] and not test4["bool_check"]:
print(colored("\nISSUE DETECTED: Test 4 status matches but boolean evaluation fails!", "red"))
print(colored("This explains why the test incorrectly shows as failed.", "red"))
def main():
args = setup_args()
url = args.url
detailed = args.detailed
print(colored("WAF Test Result Debugging Tool", "cyan"))
print(colored(f"Target: {url}", "yellow"))
# Check server connectivity
try:
response = requests.get(url, timeout=2)
print(colored(f"Server is reachable at {url}", "green"))
# Run all tests
run_all_tests(url)
except requests.exceptions.RequestException:
print(colored(f"ERROR: Cannot reach server at {url}", "red"))
print(colored("Make sure Caddy is running with your WAF configuration.", "yellow"))
sys.exit(1)
print(colored("\nDebugging complete.", "cyan"))
if __name__ == "__main__":
main()

85
debug_waf.go Normal file
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@@ -0,0 +1,85 @@
package caddywaf
import (
"fmt"
"net/http"
"os"
"strings"
"time"
"go.uber.org/zap"
)
// DebugRequest logs detailed information about a request for debugging
func (m *Middleware) DebugRequest(r *http.Request, state *WAFState, msg string) {
if m.LogSeverity != "debug" {
return
}
var ruleIDs []string
var scores []string
// Log all matched rules and their scores
m.ruleHits.Range(func(key, value interface{}) bool {
ruleID, ok := key.(RuleID)
if !ok {
return true
}
hitCount, ok := value.(HitCount)
if !ok {
return true
}
ruleIDs = append(ruleIDs, string(ruleID))
scores = append(scores, fmt.Sprintf("%s:%d", string(ruleID), hitCount))
return true
})
// Create a detailed debug log
m.logger.Debug(fmt.Sprintf("WAF DEBUG: %s", msg),
zap.String("timestamp", time.Now().Format(time.RFC3339)),
zap.String("remote_addr", r.RemoteAddr),
zap.String("method", r.Method),
zap.String("path", r.URL.Path),
zap.String("query", r.URL.RawQuery),
zap.Int("total_score", state.TotalScore),
zap.Int("anomaly_threshold", m.AnomalyThreshold),
zap.Bool("blocked", state.Blocked),
zap.Int("status_code", state.StatusCode),
zap.Bool("response_written", state.ResponseWritten),
zap.String("matched_rules", strings.Join(ruleIDs, ",")),
zap.String("rule_scores", strings.Join(scores, ",")),
)
}
// DumpRulesToFile dumps the loaded rules to a file for inspection
func (m *Middleware) DumpRulesToFile(path string) error {
f, err := os.Create(path)
if err != nil {
return err
}
defer f.Close()
f.WriteString("=== WAF Rules Dump ===\n\n")
for phase := 1; phase <= 4; phase++ {
f.WriteString(fmt.Sprintf("== Phase %d Rules ==\n", phase))
rules, ok := m.Rules[phase]
if !ok || len(rules) == 0 {
f.WriteString(" No rules for this phase\n\n")
continue
}
for i, rule := range rules {
f.WriteString(fmt.Sprintf(" Rule %d:\n", i+1))
f.WriteString(fmt.Sprintf(" ID: %s\n", rule.ID))
f.WriteString(fmt.Sprintf(" Pattern: %s\n", rule.Pattern))
f.WriteString(fmt.Sprintf(" Targets: %v\n", rule.Targets))
f.WriteString(fmt.Sprintf(" Score: %d\n", rule.Score))
f.WriteString(fmt.Sprintf(" Action: %s\n", rule.Action))
f.WriteString(fmt.Sprintf(" Description: %s\n", rule.Description))
f.WriteString("\n")
}
}
return nil
}

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debug_waf.py Normal file
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#!/usr/bin/env python3
import requests
import json
import sys
import argparse
from termcolor import colored
def setup_args():
parser = argparse.ArgumentParser(description='Debug WAF configuration via Caddy Admin API')
parser.add_argument('--admin-api', default='http://localhost:2019', help='Caddy Admin API URL (default: http://localhost:2019)')
parser.add_argument('--config-path', default='/config/', help='Config path in the API (default: /config/)')
parser.add_argument('--output', default='waf_config.json', help='Output file for configuration (default: waf_config.json)')
parser.add_argument('--pretty', action='store_true', help='Pretty-print JSON output')
parser.add_argument('--test-rules', action='store_true', help='Test WAF rules with sample requests')
parser.add_argument('--target-url', default='http://localhost:8080', help='Target URL for rule testing (default: http://localhost:8080)')
return parser.parse_args()
def get_caddy_config(admin_url, config_path):
"""Get the current Caddy configuration from the Admin API."""
try:
response = requests.get(f"{admin_url}{config_path}", timeout=5)
if response.status_code == 200:
return response.json()
else:
print(colored(f"Error fetching config: Status {response.status_code}", "red"))
return None
except requests.exceptions.RequestException as e:
print(colored(f"Error connecting to Caddy Admin API: {str(e)}", "red"))
return None
def extract_waf_config(config):
"""Extract WAF-related configuration from the Caddy config."""
if not config:
return None
waf_config = {"routes": [], "handlers": [], "thresholds": []}
# Try to find WAF configuration in apps.http.servers
if 'apps' in config and 'http' in config['apps'] and 'servers' in config['apps']['http']:
for server_name, server in config['apps']['http']['servers'].items():
print(colored(f"Examining server: {server_name}", "cyan"))
if 'routes' in server:
for route in server['routes']:
# Check for WAF in route handlers
if 'handle' in route:
for handler in route['handle']:
if handler.get('handler') == 'waf':
print(colored("Found WAF handler in route", "green"))
waf_config['routes'].append(route)
waf_config['handlers'].append(handler)
# Check for threshold
if 'anomaly_threshold' in handler:
print(colored(f"Found anomaly threshold: {handler['anomaly_threshold']}", "green"))
waf_config['thresholds'].append(handler['anomaly_threshold'])
if not waf_config['handlers']:
print(colored("No WAF handlers found in the configuration", "yellow"))
return waf_config
def save_config(config, file_path, pretty=False):
"""Save the configuration to a file."""
try:
with open(file_path, 'w') as f:
if pretty:
json.dump(config, f, indent=2)
else:
json.dump(config, f)
print(colored(f"Configuration saved to {file_path}", "green"))
except Exception as e:
print(colored(f"Error saving configuration: {str(e)}", "red"))
def test_waf_rules(target_url, waf_config):
"""Test WAF rules with sample requests to verify behavior."""
print(colored("\nTesting WAF rules with sample requests...", "cyan"))
# Check if we have any anomaly thresholds
thresholds = waf_config.get('thresholds', [])
threshold = thresholds[0] if thresholds else 5
print(colored(f"Using anomaly threshold: {threshold}", "yellow"))
# Test cases
test_cases = [
{"name": "Low Score Test", "payload": {"test": "low_score_test"}, "expected_status": 200},
{"name": "Below Threshold Test", "payload": {"param1": "score2", "param2": "score2"}, "expected_status": 200},
{"name": "Exceed Threshold Test", "payload": {"param1": "score3", "param2": "score3"}, "expected_status": 403},
{"name": "Block Action Test", "payload": {"block": "true"}, "expected_status": 403},
]
results = []
for test_case in test_cases:
print(colored(f"\nRunning test: {test_case['name']}", "cyan"))
print(colored(f"Payload: {test_case['payload']}", "yellow"))
print(colored(f"Expected status: {test_case['expected_status']}", "yellow"))
try:
response = requests.get(
target_url,
params=test_case['payload'],
headers={'User-Agent': 'WAF-Debug-Tool/1.0'},
timeout=5
)
status = response.status_code
matched = status == test_case['expected_status']
color = "green" if matched else "red"
print(colored(f"Actual status: {status} - {'✓ MATCH' if matched else '✗ MISMATCH'}", color))
print(colored(f"Response: {response.text[:100]}...", "yellow") if len(response.text) > 100 else colored(f"Response: {response.text}", "yellow"))
# Store result
results.append({
"name": test_case['name'],
"expected": test_case['expected_status'],
"actual": status,
"matched": matched
})
except requests.exceptions.RequestException as e:
print(colored(f"Error sending request: {str(e)}", "red"))
results.append({
"name": test_case['name'],
"error": str(e),
"matched": False
})
# Summary
print(colored("\nTest Results Summary:", "cyan"))
passes = sum(1 for r in results if r.get('matched', False))
failures = len(results) - passes
print(colored(f"Total Tests: {len(results)}", "yellow"))
print(colored(f"Passes: {passes}", "green"))
print(colored(f"Failures: {failures}", "red" if failures > 0 else "green"))
# Detailed results
print(colored("\nDetailed Results:", "cyan"))
for result in results:
status = "PASS" if result.get('matched', False) else "FAIL"
color = "green" if result.get('matched', False) else "red"
if 'error' in result:
print(colored(f"{result['name']}: {status} - Error: {result['error']}", color))
else:
print(colored(f"{result['name']}: {status} - Expected: {result['expected']}, Actual: {result['actual']}", color))
return results
def main():
args = setup_args()
admin_url = args.admin_api
config_path = args.config_path
output_file = args.output
pretty = args.pretty
test_rules = args.test_rules
target_url = args.target_url
print(colored("WAF Debug Tool", "cyan"))
print(colored(f"Caddy Admin API: {admin_url}", "yellow"))
# Get the current configuration
print(colored("\nFetching Caddy configuration...", "cyan"))
config = get_caddy_config(admin_url, config_path)
if config:
print(colored("Configuration retrieved successfully", "green"))
# Extract WAF configuration
print(colored("\nExtracting WAF configuration...", "cyan"))
waf_config = extract_waf_config(config)
if waf_config and waf_config['handlers']:
# Summary of WAF configuration
print(colored("\nWAF Configuration Summary:", "cyan"))
print(colored(f"WAF Handlers: {len(waf_config['handlers'])}", "yellow"))
for i, handler in enumerate(waf_config['handlers']):
print(colored(f"\nHandler {i+1}:", "yellow"))
if 'anomaly_threshold' in handler:
print(colored(f" Anomaly Threshold: {handler['anomaly_threshold']}", "green"))
else:
print(colored(" No anomaly threshold specified", "red"))
if 'rules' in handler:
print(colored(f" Rules: {len(handler['rules']) if isinstance(handler['rules'], list) else 'From file'}", "green"))
else:
print(colored(" No rules specified", "red"))
if 'rules_file' in handler:
print(colored(f" Rules File: {handler['rules_file']}", "green"))
# Test rules if requested
if test_rules:
test_waf_rules(target_url, waf_config)
# Save the WAF configuration
print(colored(f"\nSaving WAF configuration to {output_file}...", "cyan"))
save_config(waf_config, output_file, pretty)
else:
print(colored("No WAF configuration found", "red"))
print(colored("\nDebug complete.", "cyan"))
if __name__ == "__main__":
main()

5
go.mod
View File

@@ -1,7 +1,8 @@
module github.com/fabriziosalmi/caddy-waf
go 1.22.3
toolchain go1.23.4
go 1.23.0
toolchain go1.24.2
require (
github.com/caddyserver/caddy/v2 v2.9.1

View File

@@ -78,11 +78,27 @@ func (m *Middleware) ServeHTTP(w http.ResponseWriter, r *http.Request, next cadd
// isPhaseBlocked encapsulates the phase handling and blocking check logic.
func (m *Middleware) isPhaseBlocked(w http.ResponseWriter, r *http.Request, phase int, state *WAFState) bool {
m.handlePhase(w, r, phase, state)
if state.Blocked {
m.incrementBlockedRequestsMetric()
w.WriteHeader(state.StatusCode)
// IMPORTANT: Log the block event with details
m.logger.Warn("Request blocked in phase evaluation",
zap.Int("phase", phase),
zap.Int("status_code", state.StatusCode),
zap.Int("total_score", state.TotalScore),
zap.Int("anomaly_threshold", m.AnomalyThreshold),
)
// Only write the status if not already written
if !state.ResponseWritten {
w.WriteHeader(state.StatusCode)
state.ResponseWritten = true
}
return true
}
return false
}
@@ -344,23 +360,27 @@ func (m *Middleware) handlePhase(w http.ResponseWriter, r *http.Request, phase i
zap.String("target", target),
zap.String("value", value),
)
// FIXED: Correctly interpret processRuleMatch return value
var shouldContinue bool
if phase == 3 || phase == 4 {
if recorder, ok := w.(*responseRecorder); ok {
if m.processRuleMatch(recorder, r, &rule, value, state) {
return // Stop processing if the rule match indicates blocking
}
shouldContinue = m.processRuleMatch(recorder, r, &rule, value, state)
} else {
if m.processRuleMatch(w, r, &rule, value, state) {
return // Stop processing if the rule match indicates blocking
}
shouldContinue = m.processRuleMatch(w, r, &rule, value, state)
}
} else {
if m.processRuleMatch(w, r, &rule, value, state) {
return // Stop processing if the rule match indicates blocking
}
shouldContinue = m.processRuleMatch(w, r, &rule, value, state)
}
if state.Blocked || state.ResponseWritten {
m.logger.Debug("Rule evaluation completed early due to blocking or response written", zap.Int("phase", phase), zap.String("rule_id", string(rule.ID)))
// If processRuleMatch returned false or state is now blocked, stop processing
if !shouldContinue || state.Blocked || state.ResponseWritten {
m.logger.Debug("Rule evaluation stopping due to blocking or rule directive",
zap.Int("phase", phase),
zap.String("rule_id", string(rule.ID)),
zap.Bool("continue", shouldContinue),
zap.Bool("blocked", state.Blocked),
)
return
}
} else {
@@ -372,6 +392,7 @@ func (m *Middleware) handlePhase(w http.ResponseWriter, r *http.Request, phase i
}
}
}
m.logger.Debug("Rule evaluation completed for phase", zap.Int("phase", phase))
if phase == 3 {

View File

@@ -78,7 +78,8 @@ func (rve *RequestValueExtractor) ExtractValue(target string, r *http.Request, w
// extractSingleValue extracts a value based on a single target
func (rve *RequestValueExtractor) extractSingleValue(target string, r *http.Request, w http.ResponseWriter) (string, error) {
target = strings.ToUpper(strings.TrimSpace(target))
origTarget := target
targetUpper := strings.ToUpper(strings.TrimSpace(target))
var unredactedValue string
var err error
@@ -121,7 +122,7 @@ func (rve *RequestValueExtractor) extractSingleValue(target string, r *http.Requ
},
}
if extractor, exists := extractionLogic[target]; exists {
if extractor, exists := extractionLogic[targetUpper]; exists {
unredactedValue, err = extractor()
if err != nil {
return "", err // Return error from extractor
@@ -146,13 +147,16 @@ func (rve *RequestValueExtractor) extractSingleValue(target string, r *http.Requ
if err != nil {
return "", err
}
} else if strings.HasPrefix(target, TargetURLParamPrefix) {
unredactedValue, err = rve.extractURLParam(r.URL, strings.TrimPrefix(target, TargetURLParamPrefix), target)
} else if strings.HasPrefix(targetUpper, TargetURLParamPrefix) {
// CRITICAL FIX: Use the original parameter name (without uppercase conversion)
paramName := strings.TrimPrefix(origTarget, TargetURLParamPrefix)
unredactedValue, err = rve.extractURLParam(r.URL, paramName, target)
if err != nil {
return "", err
}
} else if strings.HasPrefix(target, TargetJSONPathPrefix) {
unredactedValue, err = rve.extractValueForJSONPath(r, strings.TrimPrefix(target, TargetJSONPathPrefix), target)
} else if strings.HasPrefix(targetUpper, TargetJSONPathPrefix) {
jsonPath := strings.TrimPrefix(origTarget, TargetJSONPathPrefix)
unredactedValue, err = rve.extractValueForJSONPath(r, jsonPath, target)
if err != nil {
return "", err
}
@@ -303,9 +307,17 @@ func (rve *RequestValueExtractor) extractDynamicCookie(r *http.Request, cookieNa
// Helper function to extract URL parameter value
func (rve *RequestValueExtractor) extractURLParam(url *url.URL, paramName string, target string) (string, error) {
paramValue := url.Query().Get(paramName)
// Clean up the paramName by removing any potential remaining prefix
// This is critical for handling cases where the origTarget trimming didn't fully work
cleanParamName := strings.TrimPrefix(paramName, "url_param:")
paramValue := url.Query().Get(cleanParamName)
if paramValue == "" {
rve.logger.Debug("URL parameter not found", zap.String("parameter", paramName), zap.String("target", target))
rve.logger.Debug("URL parameter not found",
zap.String("parameter", paramName),
zap.String("clean_parameter", cleanParamName),
zap.String("target", target),
zap.String("available_params", url.RawQuery)) // Log available params for debugging
return "", fmt.Errorf("url parameter '%s' not found for target: %s", paramName, target)
}
return paramValue, nil
@@ -363,13 +375,12 @@ func (rve *RequestValueExtractor) extractAllCookies(cookies []*http.Cookie, logM
return strings.Join(cookieStrings, "; "), nil
}
// Helper function for JSON path extraction.
// Helper function for JSON path extraction
func (rve *RequestValueExtractor) extractJSONPath(jsonStr string, jsonPath string) (string, error) {
// Validate input JSON string
if jsonStr == "" {
return "", fmt.Errorf("json string is empty")
}
// Validate JSON path
if jsonPath == "" {
return "", fmt.Errorf("json path is empty")
@@ -380,7 +391,6 @@ func (rve *RequestValueExtractor) extractJSONPath(jsonStr string, jsonPath strin
if err := json.Unmarshal([]byte(jsonStr), &jsonData); err != nil {
return "", fmt.Errorf("failed to unmarshal JSON: %w", err)
}
// Check if JSON data is valid
if jsonData == nil {
return "", fmt.Errorf("invalid json data")

View File

@@ -2,65 +2,38 @@ package caddywaf
import (
"bytes"
"fmt"
"net/http"
"time"
"github.com/google/uuid"
"go.uber.org/zap"
"go.uber.org/zap/zapcore"
)
// blockRequest handles blocking a request and logging the details.
func (m *Middleware) blockRequest(recorder http.ResponseWriter, r *http.Request, state *WAFState, statusCode int, reason, ruleID, matchedValue string, fields ...zap.Field) {
// CRITICAL FIX: Set these flags before any other operations
state.Blocked = true
state.StatusCode = statusCode
state.ResponseWritten = true
// Custom response handling
if resp, ok := m.CustomResponses[statusCode]; ok {
m.logger.Debug("Custom response found for status code",
zap.Int("status_code", statusCode),
zap.String("body", resp.Body),
)
m.writeCustomResponse(recorder, statusCode)
return
}
// Default blocking behavior
logID := uuid.New().String()
if logIDCtx, ok := r.Context().Value(ContextKeyLogId("logID")).(string); ok {
logID = logIDCtx
}
// Prepare standard fields for logging
blockFields := []zap.Field{
zap.String("log_id", logID),
zap.String("source_ip", r.RemoteAddr),
zap.String("user_agent", r.UserAgent()),
zap.String("request_method", r.Method),
zap.String("request_path", r.URL.Path),
zap.String("query_params", r.URL.RawQuery),
// CRITICAL FIX: Log at WARN level for visibility
m.logger.Warn("REQUEST BLOCKED BY WAF", append(fields,
zap.String("rule_id", ruleID),
zap.String("reason", reason),
zap.Int("status_code", statusCode),
zap.Time("timestamp", time.Now()),
zap.String("reason", reason), // Include the reason for blocking
zap.String("rule_id", ruleID), // Include the rule ID
zap.String("matched_value", matchedValue), // Include the matched value
}
zap.String("remote_addr", r.RemoteAddr),
zap.Int("total_score", state.TotalScore))...)
// Debug: Print the blockFields to verify they are correct
m.logger.Debug("Block fields being passed to logRequest",
zap.Any("blockFields", blockFields),
)
// CRITICAL FIX: Increment blocked metrics immediately
m.incrementBlockedRequestsMetric()
// Append additional fields if any
blockFields = append(blockFields, fields...)
// Log the blocked request at WARN level
m.logRequest(zapcore.WarnLevel, "Request blocked", r, blockFields...)
// Write default response with status code using the recorder
// Write a simple text response for blocked requests
recorder.Header().Set("Content-Type", "text/plain")
recorder.WriteHeader(statusCode)
message := fmt.Sprintf("Request blocked by WAF. Reason: %s", reason)
if _, err := recorder.Write([]byte(message)); err != nil {
m.logger.Error("Failed to write blocked response", zap.Error(err))
}
}
// responseRecorder captures the response status code, headers, and body.

View File

@@ -44,30 +44,48 @@ func (m *Middleware) processRuleMatch(w http.ResponseWriter, r *http.Request, ru
zap.Int("anomaly_threshold", m.AnomalyThreshold),
)
shouldBlock := !state.ResponseWritten && (state.TotalScore >= m.AnomalyThreshold || rule.Action == "block")
blockReason := ""
// CRITICAL FIX: Check if "mode" field in rule doesn't match the required "action" field
// There's a mismatch between Rule.Action and the "mode" field in the JSON
// Map "mode" to "action" for proper rule processing
actualAction := rule.Action
// Debug the actual action field value to verify what's being used
m.logger.Debug("Rule action/mode check",
zap.String("rule_id", string(rule.ID)),
zap.String("action_field", rule.Action),
zap.Int("score", rule.Score),
zap.Int("threshold", m.AnomalyThreshold),
zap.Int("total_score", state.TotalScore))
// CRITICAL FIX: Check if the request should be blocked
exceedsThreshold := !state.ResponseWritten && (state.TotalScore >= m.AnomalyThreshold)
explicitBlock := !state.ResponseWritten && (actualAction == "block")
shouldBlock := exceedsThreshold || explicitBlock
// Set appropriate block reason based on what triggered the block
blockReason := ""
if shouldBlock {
blockReason = "Anomaly threshold exceeded"
if rule.Action == "block" {
if exceedsThreshold {
blockReason = "Anomaly threshold exceeded"
}
if explicitBlock {
blockReason = "Rule action is 'block'"
}
}
m.logRequest(zapcore.DebugLevel, "Determining Block Action", r, // More descriptive log message
zap.String("action", rule.Action),
zap.Bool("should_block", shouldBlock),
zap.String("block_reason", blockReason),
zap.Int("total_score", state.TotalScore), // ADDED: Log total score in block decision log
zap.Int("anomaly_threshold", m.AnomalyThreshold), // ADDED: Log anomaly threshold in block decision log
)
// Ensure we're setting the blocked state
state.Blocked = true
state.StatusCode = http.StatusForbidden
if shouldBlock {
// Block the request and write the response immediately
m.blockRequest(w, r, state, http.StatusForbidden, blockReason, string(rule.ID), value,
zap.Int("total_score", state.TotalScore),
zap.Int("anomaly_threshold", m.AnomalyThreshold),
zap.String("final_block_reason", blockReason), // ADDED: Clarify block reason in blockRequest log
zap.String("final_block_reason", blockReason),
zap.Bool("explicitly_blocked", explicitBlock),
zap.Bool("threshold_exceeded", exceedsThreshold),
)
// Return false to stop processing more rules
return false
}
@@ -88,6 +106,7 @@ func (m *Middleware) processRuleMatch(w http.ResponseWriter, r *http.Request, ru
)
}
// Continue processing other rules
return true
}

112
sample_rules.json Normal file
View File

@@ -0,0 +1,112 @@
[
{
"id": "TEST-RULE-1",
"phase": 2,
"pattern": "low_score_test",
"targets": ["URL_PARAM:test"],
"severity": "low",
"score": 1,
"mode": "log",
"description": "Low score test rule",
"priority": 10
},
{
"id": "TEST-RULE-PARAM1",
"phase": 2,
"pattern": "score2",
"targets": ["URL_PARAM:param1"],
"severity": "medium",
"score": 2,
"mode": "log",
"description": "Medium score test rule for param1",
"priority": 10
},
{
"id": "TEST-RULE-PARAM2",
"phase": 2,
"pattern": "score2",
"targets": ["URL_PARAM:param2"],
"severity": "medium",
"score": 2,
"mode": "log",
"description": "Medium score test rule for param2",
"priority": 10
},
{
"id": "TEST-RULE-PARAM1-HIGH",
"phase": 2,
"pattern": "score3",
"targets": ["URL_PARAM:param1"],
"severity": "high",
"score": 3,
"mode": "log",
"description": "High score test rule for param1",
"priority": 10
},
{
"id": "TEST-RULE-PARAM2-HIGH",
"phase": 2,
"pattern": "score3",
"targets": ["URL_PARAM:param2"],
"severity": "high",
"score": 3,
"mode": "log",
"description": "High score test rule for param2",
"priority": 10
},
{
"id": "TEST-RULE-PARAM3-HIGH",
"phase": 2,
"pattern": "score3",
"targets": ["URL_PARAM:param3"],
"severity": "high",
"score": 3,
"mode": "log",
"description": "High score test rule for param3",
"priority": 10
},
{
"id": "TEST-RULE-BLOCK",
"phase": 2,
"pattern": "true",
"targets": ["URL_PARAM:block"],
"severity": "critical",
"score": 0,
"mode": "block",
"description": "Block action test rule",
"priority": 10
},
{
"id": "TEST-RULE-INCR-1",
"phase": 2,
"pattern": "score1",
"targets": ["URL_PARAM:increment"],
"severity": "low",
"score": 1,
"mode": "log",
"description": "Incremental test rule 1",
"priority": 10
},
{
"id": "TEST-RULE-INCR-2",
"phase": 2,
"pattern": "score2",
"targets": ["URL_PARAM:increment"],
"severity": "medium",
"score": 2,
"mode": "log",
"description": "Incremental test rule 2",
"priority": 10
},
{
"id": "TEST-RULE-INCR-3",
"phase": 2,
"pattern": "score3",
"targets": ["URL_PARAM:increment"],
"severity": "high",
"score": 3,
"mode": "log",
"description": "Incremental test rule 3",
"priority": 10
}
]

17
test.caddyfile Normal file
View File

@@ -0,0 +1,17 @@
{
debug
auto_https off
admin localhost:2019
}
:8080 {
route {
waf {
rule_file /Users/fab/GitHub/caddy-waf/sample_rules.json
anomaly_threshold 5
log_severity debug
metrics_endpoint /metrics
}
respond "Hello world!"
}
}

335
test_anomalythreshold.py Normal file
View File

@@ -0,0 +1,335 @@
#!/usr/bin/env python3
import requests
import json
import time
import sys
import argparse
from termcolor import colored
# --- setup_args function remains the same ---
def setup_args():
parser = argparse.ArgumentParser(description='Test WAF anomaly threshold behavior')
parser.add_argument('--url', default='http://localhost:8080', help='URL to test (default: http://localhost:8080)')
parser.add_argument('--threshold', type=int, default=5, help='Configured anomaly threshold (default: 5)')
parser.add_argument('--debug', action='store_true', help='Enable debug output for response headers')
parser.add_argument('--verbose', action='store_true', help='Show verbose test details')
return parser.parse_args()
# --- send_request function remains the same ---
def send_request(url, payload, headers=None, expected_status=None, debug=False):
"""
Send a request with the given payload and validate the response.
Returns:
tuple: (response object or None, dict of found WAF headers, bool or None for passed status)
'passed' is True if status matches expected_status, False if it doesn't or error occurs,
None if expected_status was not provided.
"""
if headers is None:
headers = {'User-Agent': 'WAF-Threshold-Test/1.0'}
print(colored(f"\n>>> Sending request to {url}", "blue"))
print(colored(f">>> Payload: {payload}", "blue"))
passed = None # Default if no expectation set
try:
response = requests.get(
url,
params=payload,
headers=headers,
timeout=10 # Increased timeout slightly
)
status = response.status_code
# Determine pass/fail based on expected status
if expected_status is not None:
passed = (status == expected_status)
color = "green" if passed else "red"
result_text = "✓ PASS" if passed else "✗ FAIL"
print(colored(f"<<< Status: {status} (Expected: {expected_status}) - {result_text}", color))
else:
# No expected status, just report what we got
print(colored(f"<<< Status: {status}", "yellow"))
response_text = response.text
print(colored(f"<<< Response: {response_text[:100]}...", "yellow") if len(response_text) > 100 else colored(f"<<< Response: {response_text}", "yellow"))
# Check for WAF-specific headers
waf_headers = {}
if debug:
print(colored("\n--- Response Headers ---", "cyan"))
for header, value in response.headers.items():
print(colored(f" {header}: {value}", "yellow"))
# Check for common WAF score headers - these may vary based on your WAF implementation
lower_header = header.lower()
if lower_header in ('x-waf-score', 'x-waf-anomaly-score', 'x-waf-status', 'x-waf-rules', 'x-waf-action'):
waf_headers[lower_header] = value
print(colored(f" Found WAF header: {header}={value}", "green"))
print(colored("--- End Headers ---", "cyan"))
return response, waf_headers, passed
except requests.exceptions.Timeout:
print(colored(f"Error: Request timed out after 10 seconds.", "red"))
passed = False # Timeout is a failure if status was expected
if expected_status is not None:
print(colored(f"<<< Status: TIMEOUT (Expected: {expected_status}) - ✗ FAIL", "red"))
else:
print(colored(f"<<< Status: TIMEOUT", "red"))
return None, {}, passed
except requests.exceptions.RequestException as e:
print(colored(f"Error sending request: {str(e)}", "red"))
passed = False # Request error is a failure if status was expected
if expected_status is not None:
print(colored(f"<<< Status: ERROR (Expected: {expected_status}) - ✗ FAIL", "red"))
else:
print(colored(f"<<< Status: ERROR", "red"))
return None, {}, passed
# --- test_anomaly_threshold function is UPDATED ---
def test_anomaly_threshold(base_url, threshold, debug=False, verbose=False):
"""Test that anomaly threshold is properly enforced."""
print(colored(f"\n=== Testing Anomaly Threshold (threshold={threshold}) ===", "cyan"))
results_data = {} # Store results keyed by test name
# --- Original Tests ---
# Test 1: Low score (should pass, 200 OK)
print(colored("\nTest 1: Low-score rule (should pass with 200 OK)", "magenta"))
low_score_payload = {'test': 'low_score_test'} # RULE-1 (Score 1)
expected_score = 1
low_response, low_headers, test1_passed = send_request(base_url, low_score_payload, expected_status=200, debug=debug)
results_data["Test 1 (Low score)"] = (test1_passed, low_response.status_code if low_response else "ERROR", f"Expected 200 OK for low score ({expected_score}) < threshold ({threshold})")
print(colored(f"-> Expected anomaly score contribution: {expected_score}", "yellow"))
# Test 2: Score below threshold (should pass, 200 OK)
print(colored(f"\nTest 2: Score below threshold (should pass with 200 OK)", "magenta"))
below_threshold_payload = {'param1': 'score2', 'param2': 'score2'} # RULE-PARAM1 (2) + RULE-PARAM2 (2) = 4
expected_total_score = 4
below_response, below_headers, test2_passed = send_request(base_url, below_threshold_payload, expected_status=200, debug=debug)
results_data["Test 2 (Below threshold)"] = (test2_passed, below_response.status_code if below_response else "ERROR", f"Expected 200 OK for score ({expected_total_score}) < threshold ({threshold})")
print(colored(f"-> Expected total anomaly score: {expected_total_score} (Threshold: {threshold})", "yellow"))
# Test 3: Score exceeding threshold (should block, 403 Forbidden)
print(colored(f"\nTest 3: Score exceeding threshold (should block with 403 Forbidden)", "magenta"))
exceed_threshold_payload = {'param1': 'score3', 'param2': 'score3'} # RULE-PARAM1-HIGH (3) + RULE-PARAM2-HIGH (3) = 6
expected_total_score = 6
exceed_response, exceed_headers, test3_passed = send_request(base_url, exceed_threshold_payload, expected_status=403, debug=debug)
results_data["Test 3 (Exceed threshold)"] = (test3_passed, exceed_response.status_code if exceed_response else "ERROR", f"Expected 403 Forbidden for score ({expected_total_score}) >= threshold ({threshold})")
print(colored(f"-> Expected total anomaly score: {expected_total_score} (Threshold: {threshold})", "yellow"))
# Test 4: Explicit 'block' action rule (should block, 403 Forbidden)
print(colored("\nTest 4: Explicit 'block' action rule (should block with 403 Forbidden)", "magenta"))
block_action_payload = {'block': 'true'} # RULE-BLOCK (Block Action)
block_response, block_headers, test4_passed = send_request(base_url, block_action_payload, expected_status=403, debug=debug)
results_data["Test 4 (Block action)"] = (test4_passed, block_response.status_code if block_response else "ERROR", "Expected 403 Forbidden for explicit block action")
print(colored("-> Score doesn't matter for this test - blocking action should take precedence", "yellow"))
# Test 5: Incremental scoring in separate requests (should pass, 200 OK)
print(colored("\nTest 5: Incremental scoring in separate requests (should be isolated per request, pass with 200 OK)", "magenta"))
incremental_results_passed = []
incremental_status_codes = []
for i in range(1, 4): # Tests INCR-1 (1), INCR-2 (2), INCR-3 (3)
print(colored(f"--- Request {i} of incremental test ---", "cyan"))
incremental_payload = {'increment': f'score{i}'}
expected_score = i
incremental_response, inc_headers, single_inc_passed = send_request(base_url, incremental_payload, expected_status=200, debug=debug)
incremental_results_passed.append(single_inc_passed if single_inc_passed is not None else False)
incremental_status_codes.append(incremental_response.status_code if incremental_response else "ERROR")
print(colored(f"-> Expected anomaly score contribution for this request: {expected_score}", "yellow"))
if i < 3: time.sleep(0.2) # Shorter delay
test5_passed = all(incremental_results_passed)
status_summary = ', '.join(map(str, incremental_status_codes))
results_data["Test 5 (Incremental)"] = (test5_passed, status_summary, f"Expected 200 OK for all incremental tests (scores {', '.join(map(str,range(1,4)))}) < threshold ({threshold})")
# --- NEW TESTS ---
# Test 6: Score hitting exact threshold (should block, 403 Forbidden)
print(colored(f"\nTest 6: Score hitting exact threshold (should block with 403 Forbidden)", "magenta"))
exact_threshold_payload = {'param1': 'score2', 'param2': 'score3'} # RULE-PARAM1 (2) + RULE-PARAM2-HIGH (3) = 5
expected_total_score = 5
exact_response, exact_headers, test6_passed = send_request(base_url, exact_threshold_payload, expected_status=403, debug=debug)
results_data["Test 6 (Exact threshold)"] = (test6_passed, exact_response.status_code if exact_response else "ERROR", f"Expected 403 Forbidden for score ({expected_total_score}) == threshold ({threshold})")
print(colored(f"-> Expected total anomaly score: {expected_total_score} (Threshold: {threshold})", "yellow"))
# Test 7: Mix High/Low score below threshold (should pass, 200 OK)
print(colored(f"\nTest 7: Mix High/Low score below threshold (should pass with 200 OK)", "magenta"))
mix_below_payload = {'test': 'low_score_test', 'param1': 'score3'} # RULE-1 (1) + RULE-PARAM1-HIGH (3) = 4
expected_total_score = 4
mix_below_response, mix_below_headers, test7_passed = send_request(base_url, mix_below_payload, expected_status=200, debug=debug)
results_data["Test 7 (Mix Below Threshold)"] = (test7_passed, mix_below_response.status_code if mix_below_response else "ERROR", f"Expected 200 OK for mixed score ({expected_total_score}) < threshold ({threshold})")
print(colored(f"-> Expected total anomaly score: {expected_total_score} (Threshold: {threshold})", "yellow"))
# Test 8: Score greatly exceeding threshold (with Param3) (should block, 403 Forbidden)
print(colored(f"\nTest 8: Score greatly exceeding threshold (should block with 403 Forbidden)", "magenta"))
exceed_greatly_payload = {'param1': 'score3', 'param2': 'score3', 'param3': 'score3'} # RULE-PARAM1-HIGH (3) + RULE-PARAM2-HIGH (3) + RULE-PARAM3-HIGH (3) = 9
expected_total_score = 9
exceed_greatly_response, exceed_greatly_headers, test8_passed = send_request(base_url, exceed_greatly_payload, expected_status=403, debug=debug)
results_data["Test 8 (Exceed Greatly)"] = (test8_passed, exceed_greatly_response.status_code if exceed_greatly_response else "ERROR", f"Expected 403 Forbidden for score ({expected_total_score}) >= threshold ({threshold})")
print(colored(f"-> Expected total anomaly score: {expected_total_score} (Threshold: {threshold})", "yellow"))
# Test 9: Block action triggered with other scoring rules (should block, 403 Forbidden)
print(colored(f"\nTest 9: Block action priority (should block with 403 Forbidden)", "magenta"))
block_priority_payload = {'block': 'true', 'param1': 'score2'} # RULE-BLOCK (block) + RULE-PARAM1 (2)
expected_total_score = 2 # Score is calculated but block action takes precedence
block_priority_response, block_priority_headers, test9_passed = send_request(base_url, block_priority_payload, expected_status=403, debug=debug)
results_data["Test 9 (Block Priority)"] = (test9_passed, block_priority_response.status_code if block_priority_response else "ERROR", "Expected 403 Forbidden due to explicit block action, regardless of score")
print(colored(f"-> Calculated anomaly score: {expected_total_score}. Block action should override.", "yellow"))
# Test 10: No matching rules (should pass, 200 OK)
print(colored(f"\nTest 10: No matching rules (should pass with 200 OK)", "magenta"))
no_match_payload = {'vanilla': 'test', 'unknown': 'data'}
expected_total_score = 0
no_match_response, no_match_headers, test10_passed = send_request(base_url, no_match_payload, expected_status=200, debug=debug)
results_data["Test 10 (No Match)"] = (test10_passed, no_match_response.status_code if no_match_response else "ERROR", f"Expected 200 OK when no rules match (score {expected_total_score})")
print(colored(f"-> Expected total anomaly score: {expected_total_score}", "yellow"))
# Test 11: Parameter name match, value mismatch (should pass, 200 OK)
print(colored(f"\nTest 11: Parameter name match, value mismatch (should pass with 200 OK)", "magenta"))
value_mismatch_payload = {'param1': 'non_matching_value', 'test': 'another_value'} # Neither value matches RULE-PARAM1 or RULE-1 patterns
expected_total_score = 0
value_mismatch_response, value_mismatch_headers, test11_passed = send_request(base_url, value_mismatch_payload, expected_status=200, debug=debug)
results_data["Test 11 (Value Mismatch)"] = (test11_passed, value_mismatch_response.status_code if value_mismatch_response else "ERROR", f"Expected 200 OK when parameter values don't match rule patterns (score {expected_total_score})")
print(colored(f"-> Expected total anomaly score: {expected_total_score}", "yellow"))
# Summarize results
print(colored("\n=== Anomaly Threshold Test Summary ===", "cyan"))
print(colored(f"Target URL: {base_url}", "yellow"))
print(colored(f"Configured threshold: {threshold}", "yellow"))
all_passed_flag = True
# Define the order tests should appear in the summary
test_order = [
"Test 1 (Low score)",
"Test 2 (Below threshold)",
"Test 7 (Mix Below Threshold)", # New test inserted logically
"Test 5 (Incremental)", # Incremental scores are below threshold
"Test 10 (No Match)",
"Test 11 (Value Mismatch)",
"Test 6 (Exact threshold)", # Blocking test
"Test 3 (Exceed threshold)", # Blocking test
"Test 8 (Exceed Greatly)", # Blocking test
"Test 4 (Block action)", # Blocking test
"Test 9 (Block Priority)" # Blocking test
]
print(colored("\n--- Test Results ---", "cyan"))
for test_name in test_order:
if test_name not in results_data:
print(colored(f"{test_name}: SKIPPED (Data not found)", "yellow"))
all_passed_flag = False # Consider missing data a failure
continue
passed, status_code, description = results_data[test_name]
# Treat None passed status as False for summary
passed = passed if passed is not None else False
result_text = "PASS" if passed else "FAIL"
color = "green" if passed else "red"
print(colored(f"{test_name}: {result_text} (Status: {status_code})", color))
if not passed:
all_passed_flag = False
print(colored(f" Reason: {description}", "yellow"))
elif verbose:
print(colored(f" Details: {description} (Status: {status_code})", "yellow"))
# Final Pass/Fail Summary
print(colored("\n--- Overall Result ---", "cyan"))
if all_passed_flag:
print(colored("✓ All tests passed! Anomaly threshold and blocking logic appear to be working correctly based on expected status codes.", "green"))
else:
print(colored("✗ Some tests failed. Review the output above.", "red"))
failed_tests = [name for name in test_order if name in results_data and not results_data[name][0]]
print(colored(f"Failed tests: {', '.join(failed_tests)}", "red"))
# Provide troubleshooting tips based on failure patterns
test3_failed = "Test 3 (Exceed threshold)" in failed_tests
test4_failed = "Test 4 (Block action)" in failed_tests
test6_failed = "Test 6 (Exact threshold)" in failed_tests
test8_failed = "Test 8 (Exceed Greatly)" in failed_tests
test9_failed = "Test 9 (Block Priority)" in failed_tests
blocking_tests_failed = test3_failed or test4_failed or test6_failed or test8_failed or test9_failed
if blocking_tests_failed:
print(colored("\nSuggestion: One or more blocking tests failed (expected 403).", "yellow"))
if test6_failed : print(colored(" - Check if the WAF blocks exactly *at* the threshold score.", "yellow"))
if test3_failed or test8_failed: print(colored(f" - Verify rules correctly contribute scores and the threshold ({threshold}) is enforced.", "yellow"))
if test4_failed or test9_failed: print(colored(" - Ensure rules with 'block' action are correctly configured and take priority.", "yellow"))
if "Test 5 (Incremental)" in failed_tests:
print(colored("\nSuggestion: One or more incremental tests failed (expected 200). This might indicate score accumulation across requests (incorrect) or unrelated blocking rules triggered.", "yellow"))
if "Test 10 (No Match)" in failed_tests or "Test 11 (Value Mismatch)" in failed_tests :
print(colored("\nSuggestion: Tests expecting no match failed (expected 200). Check for overly broad rules or default blocking actions.", "yellow"))
# --- check_server function remains the same ---
def check_server(url):
"""Check if the server is reachable."""
print(f"\nChecking server reachability at {url}...")
try:
# Use HEAD request for efficiency, or GET if HEAD is disallowed/problematic
response = requests.head(url, timeout=3)
# Allow any success or redirect status code as "reachable"
if 200 <= response.status_code < 400:
print(colored(f"Server is reachable (Status: {response.status_code}).", "green"))
return True
else:
# Handle client/server errors differently
if 400 <= response.status_code < 500:
print(colored(f"Server responded with client error: {response.status_code}. Check URL path/config.", "yellow"))
elif 500 <= response.status_code < 600:
print(colored(f"Server responded with server error: {response.status_code}. Check server/WAF logs.", "red"))
else:
print(colored(f"Server responded with unexpected status: {response.status_code}.", "yellow"))
return False # Treat non-success/redirect as potentially problematic
except requests.exceptions.Timeout:
print(colored(f"ERROR: Connection to {url} timed out.", "red"))
print(colored("Check if the server/proxy is running and accessible.", "yellow"))
return False
except requests.exceptions.ConnectionError:
print(colored(f"ERROR: Cannot connect to server at {url}", "red"))
print(colored("Make sure the server/proxy (e.g., Caddy) is running and the URL is correct.", "yellow"))
return False
except requests.exceptions.RequestException as e:
print(colored(f"ERROR: An unexpected network error occurred: {str(e)}", "red"))
return False
# --- main function is UPDATED (info section) ---
def main():
args = setup_args()
base_url = args.url.rstrip('/') # Remove trailing slash if present
threshold = args.threshold
debug = args.debug
verbose = args.verbose
print(colored(f"WAF Anomaly Threshold Test Tool", "cyan", attrs=["bold"]))
print(colored("-" * 30, "cyan"))
print(f"Target URL: {base_url}")
print(f"Expected Threshold: {threshold}")
print(f"Debug Mode: {'ON' if debug else 'OFF'}")
print(f"Verbose Mode: {'ON' if verbose else 'OFF'}")
print(colored("-" * 30, "cyan"))
# UPDATED Test rule setup recommendations
print(colored("\nINFO: This script assumes specific WAF rules are configured:", "yellow"))
print(colored(" - Rule(s) matching 'test=low_score_test' contribute score=1.", "yellow"))
print(colored(" - Rule(s) matching 'param1=score2' contribute score=2.", "yellow"))
print(colored(" - Rule(s) matching 'param2=score2' contribute score=2.", "yellow"))
print(colored(" - Rule(s) matching 'param1=score3' contribute score=3.", "yellow"))
print(colored(" - Rule(s) matching 'param2=score3' contribute score=3.", "yellow"))
print(colored(" - Rule(s) matching 'param3=score3' contribute score=3. (Used in Test 8)", "yellow")) # Added param3 rule info
print(colored(" - Rule matching 'block=true' has an explicit 'block' action.", "yellow"))
print(colored(" - Rule(s) matching 'increment=scoreX' contribute score=X (e.g., 'increment=score1' adds 1).", "yellow"))
if not check_server(base_url):
sys.exit(1)
test_anomaly_threshold(base_url, threshold, debug, verbose)
if __name__ == "__main__":
main()

View File

@@ -120,7 +120,7 @@ type Rule struct {
Targets []string `json:"targets"`
Severity string `json:"severity"` // Used for logging only
Score int `json:"score"`
Action string `json:"mode"` // Determines the action (block/log)
Action string `json:"mode"` // CRITICAL FIX: This should map to the "mode" field in JSON
Description string `json:"description"`
regex *regexp.Regexp
Priority int // New field for rule priority