CVE-2023-46733: Possible session fixation
Symfony versions >=5.4.21, <5.4.31, and >= 6.2.7, < 6.3.8 of the Symfony Security HTTP component are affected by this security issue.
The issue has been fixed in Symfony 5.4.31, 6.3.8.
SessionStrategyListener does not always migrate the session after a
successful login. It only migrate the session when the logged-in user identifier
changes. In some use cases, the user identifier doesn't change between the
verification phase and the successful login, while the token itself changes from
one type (partially-authenticated) to another (fully-authenticated). When this
happens, the session
id should be regenerated to prevent possible session
Symfony now checks the type of the token in addition to the user identifier before deciding whether the session id should be regenerated.
The patch for this issue is available here for branch 5.4.
We would like to thank Robert Meijers for reporting the issue and providing the fix.
Have found a security issue in Symfony? Send the details to security [at] symfony.com and don't disclose it publicly until we can provide a fix for it.
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