Description
Symfony 2.3.x before 2.3.35, 2.6.x before 2.6.12, and 2.7.x before 2.7.7 might allow remote attackers to have unspecified impact via a timing attack involving the (1) Symfony/Component/Security/Http/RememberMe/PersistentTokenBasedRememberMeServices or (2) Symfony/Component/Security/Http/Firewall/DigestAuthenticationListener class in the Symfony Security Component, or (3) legacy CSRF implementation from the Symfony/Component/Form/Extension/Csrf/CsrfProvider/DefaultCsrfProvider class in the Symfony Form component.
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 | 2.7.7+dfsg-1 | — |
| Debian 13 | symfony | 2.7.7+dfsg-1 | — |
| Debian 12 | symfony | 2.7.7+dfsg-1 | — |
| Debian 8 | symfony | 2.3.21+dfsg-4+deb8u2 | DSA-3402-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Packagist | symfony/form | >= 2.3.0, < 2.3.35 | 2.3.35 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/form | >= 2.4.0, < 2.6.12 | 2.6.12 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/form | >= 2.7.0, < 2.7.7 | 2.7.7 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/security | >= 2.3.0, < 2.3.35 | 2.3.35 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/security | >= 2.4.0, < 2.6.12 | 2.6.12 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/security | >= 2.7.0, < 2.7.7 | 2.7.7 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/security-http | >= 2.4.0, < 2.6.12 | 2.6.12 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/security-http | >= 2.7.0, < 2.7.7 | 2.7.7 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/symfony | >= 2.3.0, < 2.3.35 | 2.3.35 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/symfony | >= 2.7.0, < 2.7.7 | 2.7.7 | GHSA-g97c-jfx6-xvxh |
| Packagist | symfony/symfony | >= 2.4.0, < 2.6.12 | 2.6.12 | GHSA-g97c-jfx6-xvxh |
Advisories 1
- DSA-3402-1 symfony - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- FEDORA-2015-0efcb5fbc5 vendor-advisory
- FEDORA-2015-0b89738311 vendor-advisory
- DSA-3402 vendor-advisory
- https://symfony.com/blog/cve-2015-8125-potential-remote-timing-attack-vulnerability-in-security-remember-me-service
- 77692 vdb-entry