Symfony2 security issue when the trust proxy mode is enabled
An application is vulnerable if it uses the client IP address as returned by the Request::getClientIp() method for sensitive decisions like IP based access control.
To fix this security issue, the following changes have been made to all versions of Symfony2:
A new Request::setTrustedProxies() method has been introduced and should be used intead of Request::trustProxyData() to enable the trust proxy mode. It takes an array of trusted proxy IP addresses as its argument:
// before (probably in your front controller script)
Request::trustProxyData();
// after
Request::setTrustedProxies(array('1.1.1.1'));
// 1.1.1.1 being the IP address of a trusted reverse proxyThe Request::trustProxyData() method has been deprecated (when used, it automatically trusts the latest proxy in the chain -- which is the current remote address):
Request::trustProxyData();
// is equivalent to
Request::setTrustedProxies(array($request->server->get('REMOTE_ADDR')));We encourage all Symfony2 users to upgrade as soon as possible. It you don't want to upgrade to the latest version yet, you can also apply the following patches:
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | symfony/http-foundation | >= 2.0.0, < 2.0.19, >= 2.1.0, < 2.1.4 | 2.0.19, 2.1.4 |
| Composer package | symfony/symfony | >= 2.0.0, < 2.0.19, >= 2.1.0, < 2.1.4 | 2.0.19, 2.1.4 |
References
- https://github.com/symfony/http-foundation/commit/5cde5229fc71a19cef2a0a933a18e08e43252f34
- https://github.com/symfony/http-foundation/commit/795ac45c188ee2a729db4513e9dfd30b16a0ed35
- https://github.com/symfony/symfony/commit/9ce892cf4395e73b136e9b5cd1fae9e91995c93b
- https://github.com/symfony/symfony/commit/e5536f0fe10421da7ebbe0071343e94d039dfb97
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/http-foundation/2012-11-29.yaml
- https://symfony.com/blog/security-release-symfony-2-0-19-and-2-1-4
- Weakness (CWE)
-- Platform
- Composer
- Package
symfony/http-foundation, symfony/symfony- Disclosed
- 30.05.2024
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-vfm6-r2gc-pwww - CC BY 4.0
Vulnerability history: symfony/http-foundation
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 14
- First → latest
- 12.2019 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 3
- Medium 8
- Low 2
Disclosures per year
- 2019: 2
- 2020: 1
- 2021: 0
- 2022: 4
- 2023: 0
- 2024: 5
- 2025: 1
- 2026: 1
-
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