CVE-2024-51996: Symphony has an Authentication Bypass via RememberMe
First published: Wed Nov 13 2024(Updated: )
### Description When consuming a persisted remember-me cookie, Symfony does not check if the username persisted in the database matches the username attached with the cookie, leading to authentication bypass. ### Resolution The `PersistentRememberMeHandler` class now ensures the submitted username is the cookie owner. The patch for this issue is available [here](https://github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a) for branch 5.4. ### Credits We would like to thank Moritz Rauch - Pentryx AG for reporting the issue and Jérémy Derussé for providing the fix.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| composer/symfony/security-http | >=7.0.0-BETA1<7.1.8 | 7.1.8 |
| composer/symfony/security-http | >=6.0.0-BETA1<6.4.15 | 6.4.15 |
| composer/symfony/security-http | >=5.3.0<5.4.47 | 5.4.47 |
| debian/symfony | <=4.4.19+dfsg-2+deb11u6 | 5.4.23+dfsg-1+deb12u4 6.4.18+dfsg-1 |
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Reference Links
- https://github.com/symfony/symfony/security/advisories/GHSA-cg23-qf8f-62rr
- https://github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/security-http/CVE-2024-51996.yaml
- https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2024-51996.yaml
- https://symfony.com/cve-2024-51996
- https://nvd.nist.gov/vuln/detail/CVE-2024-51996
- https://github.com/advisories/GHSA-cg23-qf8f-62rr (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-51996
- https://launchpad.net/bugs/cve/CVE-2024-51996
- https://security-tracker.debian.org/tracker/CVE-2024-51996
- https://ubuntu.com/security/CVE-2024-51996
Frequently Asked Questions
What is the severity of CVE-2024-51996?
CVE-2024-51996 is classified as a high severity vulnerability due to its potential for authentication bypass.
How do I fix CVE-2024-51996?
To resolve CVE-2024-51996, upgrade the symfony/security-http package to version 7.1.8, 6.4.15, or 5.4.47.
What causes CVE-2024-51996?
CVE-2024-51996 is caused by Symfony not verifying if the username in a persisted remember-me cookie matches the username in the database.
Which versions of Symfony are affected by CVE-2024-51996?
Versions of Symfony between 7.0.0-BETA1 and 7.1.8, 6.0.0-BETA1 and 6.4.15, and 5.3.0 and 5.4.47 are affected by CVE-2024-51996.
Is CVE-2024-51996 a persistent vulnerability?
Yes, CVE-2024-51996 is considered persistent as it affects the functioning of persisted remember-me cookies in Symfony.
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