* Add SSRF mitigations using `filter_var` and `CURLOPT_RESOLVE`
The idea is to prevent FreshRSS from sending any HTTP requests to internal services, except for the ones that are explicitly allowed in the config.
Based on https://github.com/moodle/moodle/blob/6e82b46a480826d1a85394d9e5087f7d82d1dd52/lib/filelib.php#L3818 and https://github.com/symfony/symfony/blob/8.1/src/Symfony/Component/HttpClient/NoPrivateNetworkHttpClient.phphttps://github.com/FreshRSS/simplepie/pull/76https://github.com/FreshRSS/simplepie/pull/78
* Add allowlist setting in Web UI
* make readme
* Update app/i18n/fr/admin.php
Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
* make readme again
* make readme
* Further work
Still WIP and needs testing etc.
* Readd previous if check for domain combination allowlist
* Turn POST to GET after redirect
* Improve
* Update config.default.php
Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
* make readme
* Skip SSRF check if `CURLOPT_PROXY` is set
* make readme
* Fix `!empty()` mistake
* Respect max redirects feed option when fetching with `httpGet()`
* Respect max redirects during SimplePie fetching + fix bypass
bypass fix: `CURLOPT_FOLLOWLOCATION` was moved below so that emulated redirects are enforced.
* Avoid FreshRSS and Minz code in SimplePie
https://github.com/FreshRSS/FreshRSS/pull/8400#discussion_r2935375980
* Corrected hook code
* phpdoc wrong return type
* Add CIDR support in allowlist
* Implement simple DNS caching
* Suppress `dns_get_record()` warnings
* A bit of proof-reading
* Minor typo
* Fix proxy logic
* Fix HTTP POST redirect logic
* Proofread checkCIDR
Add fixes for several situations
* Remove credentials from URL in logs
* Ensure `CURLOPT_FOLLOWLOCATION` is `false` by setting it at the end
* Fix codesniffer long line
* Fix potential bypass due to wrong return value
If there were no records returned by `dns_get_record()`, no overrides to `CURLOPT_RESOLVE` would get passed,
and a potential bypass could occur, when cURL would try to resolve the domain by itself.
* Put the URL at the end in logs
* Add documentation and environment variable support
* make readme
* Fix wrong behavior in case of IP
* Fix duplicate selector in CSS
* Minor type check change
* i18n fr, en
* Minor type check change
* Fix whitespace i18n fr
* make fix-all
* Fix `$ips_ok` not being returned after domain records were cached
* make readme
* PHPStan fix
* make readme
* Minor syntax in SimplePie
* Only return `null` if no allowed IPs were found
* Add wildcard *, help message
* Consistent docs with help message
* i18n: pl
* SimplePie compatibility PHP 7.2
* make fix-all
* Sync SimplePie
* https://github.com/FreshRSS/simplepie/pull/76
* 💥 Breaking change in the Changelog
* Document `INTERNAL_HOST_ALLOWLIST` in Docker docs
* Remove `Cookie` and `Authorization` headers in `httpGet()` during cross-origin redirect
* Minor whitespace
And same comment convention than below
* Remove authentication headers and change POST to GET on redirect in SimplePie
* Remove .local in Docker example
* Fill in default ports when comparing URL origins
* Remove .local from other places than the Docker example
* Rewrite WebSub subscribe to use `httpGet()`
* make fix-all
* Also unset `CURLOPT_USERPWD` during redirects
* phpcs fix
* Always unset `CURLOPT_FOLLOWLOCATION`
* Bump SimplePie
https://github.com/FreshRSS/simplepie/pull/78
* Update logic for CURLOPT_FOLLOWLOCATION
* Fix PHPStan
* Changelog fix security section
* Update most common RSS Bridge case
https://hub.docker.com/r/rssbridge/rss-bridge
* Replace misleading 127.0.0.1:8080 example for Docker
This does not make sense for a Docker container
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Co-authored-by: Alexandre Alapetite <alexandre@alapetite.fr>
Alexandre Alapetite