Symfony vulnerable to Session Fixation of CSRF tokens
Package
Affected versions
>= 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
Patched versions
4.4.50
5.4.20
6.0.20
6.1.12
6.2.6
>= 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
4.4.50
5.4.20
6.0.20
6.1.12
6.2.6
Description
Published to the GitHub Advisory Database
Feb 1, 2023
Reviewed
Feb 1, 2023
Published by the National Vulnerability Database
Feb 3, 2023
Last updated
Jul 12, 2023
Credits
-
nicolas-grekas Analyst
-
lavish Analyst
Description
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.
Resolution
Symfony removes all CSRF tokens from the session on successful login.
The patch for this issue is available here for branch 4.4.
Credits
We would like to thank Marco Squarcina for reporting the issue and Nicolas Grekas for fixing it.
References