CVE-2023-46733
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in versions 5.4.21 and 6.2.7 and prior to versions 5.4.31 and 6.3.8, `SessionStrategyListener` does not migrate the session after every successful login. It does so only in case the logged in user changes by means of checking the user identifier. 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 fixations, which is not the case at the moment. As of versions 5.4.31 and 6.3.8, Symfony now checks the type of the token in addition to the user identifier before deciding whether the session id should be regenerated.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 5.4.31+dfsg-1 |
| sid | Fixed | 5.4.31+dfsg-1 |
| forky | Fixed | 5.4.31+dfsg-1 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 5.4.23+dfsg-1+deb12u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Packagist | symfony/security-http | >=5.4.21,<5.4.31 | 5.4.31 |
| Packagist | symfony/security-http | >=6.2.7,<6.3.8 | 6.3.8 |
| Packagist | symfony/symfony | >=5.4.21,<5.4.31 | 5.4.31 |
| Packagist | symfony/symfony | >=6.2.7,<6.3.8 | 6.3.8 |
References
- https://github.com/symfony/symfony/security/advisories/GHSA-m2wj-r6g3-fxfx
- https://nvd.nist.gov/vuln/detail/CVE-2023-46733
- https://github.com/symfony/symfony/commit/7467bd7e3f888b333102bc664b5e02ef1e7f88b9
- https://github.com/symfony/symfony/commit/dc356499d5ceb86f7cf2b4c7f032eca97061ed74
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2023-46733.yaml
- https://github.com/symfony/symfony
- https://symfony.com/cve-2023-46733
- https://security-tracker.debian.org/tracker/CVE-2023-46733
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.