Description
An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. The current implementation of CSRF protection in Symfony (Version >=2) does not use different tokens for HTTP and HTTPS; therefore the token is subject to MITM attacks on HTTP and can then be used in an HTTPS context to do CSRF attacks.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | symfony | 3.4.0+dfsg-1 | — |
| Debian 13 | symfony | 3.4.0+dfsg-1 | — |
| Debian 12 | symfony | 3.4.0+dfsg-1 | — |
| Debian 9 | symfony | 2.8.7+dfsg-1.3+deb9u1 | DSA-4262-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | symfony | No fix yet | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | symfony/security | >= 2.7.0, < 2.7.38 | 2.7.38 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security | >= 2.8.0, < 2.8.31 | 2.8.31 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security | >= 3.0.0, < 3.2.14 | 3.2.14 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security | >= 3.3.0, < 3.3.13 | 3.3.13 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security-csrf | >= 2.7.0, < 2.7.38 | 2.7.38 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security-csrf | >= 2.8.0, < 2.8.31 | 2.8.31 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security-csrf | >= 3.0.0, < 3.2.14 | 3.2.14 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/security-csrf | >= 3.3.0, < 3.3.13 | 3.3.13 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/symfony | >= 2.7.0, < 2.7.38 | 2.7.38 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/symfony | >= 2.8.0, < 2.8.31 | 2.8.31 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/symfony | >= 3.0.0, < 3.2.14 | 3.2.14 | GHSA-92x6-h2gr-8gxq |
| Packagist | symfony/symfony | >= 3.3.0, < 3.3.13 | 3.3.13 | GHSA-92x6-h2gr-8gxq |
Advisories 1
- DSA-4262-1 symfony - security update Debian Security (DSA / DLA) · Mar 9, 2026