| Package | Affected versions | Patched versions |
|---|---|---|
| symfony/security-bundle | ≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6 | 4.4.505.4.206.0.206.1.126.2.6 |
| symfony/symfony | ≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6 | 4.4.505.4.206.0.206.1.126.2.6 |
| symfony | ≥ 2.0.0, < 4.4.50≥ 5.0.0, < 5.4.20≥ 6.0.0, < 6.0.20≥ 6.1.0, < 6.1.12≥ 6.2.0, < 6.2.6 | 4.4.505.4.206.0.206.1.126.2.6 |
When authenticating users Symfony by default regenerates the session ID upon login, but preserves the rest of session attributes. Because this does not clear CSRF tokens upon login, this might enables same-site attackers to bypass the CSRF protection mechanism by performing an attack similar to a session-fixation.
Symfony removes all CSRF tokens from the session on successful login.
The patch for this issue is available here for branch 4.4.
We would like to thank Marco Squarcina for reporting the issue and Nicolas Grekas for fixing it.
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