Authentication bypass in Symfony

1) Improper authentication

EUVDB-ID: #VU100537

Risk: High

CVSSv4.0: 8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-51996

CWE-ID: CWE-287 - Improper Authentication

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error during authentication when using the persisted remember-me cookie. The application does not check if the username persisted in the database matches the username attached with the cookie. A remote non-authenticated attacker can bypass authentication process and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Symfony: 5.0.0 - 7.1.7

CPE2.3

• cpe:2.3:a:sensiolabs:symfony:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:sensiolabs:symfony:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:sensiolabs:symfony:5.0.2:*:*:*:*:*:*:*

External links

https://github.com/symfony/symfony/security/advisories/GHSA-cg23-qf8f-62rr
https://github.com/symfony/symfony/commit/81354d392c5f0b7a52bcbd729d6f82501e94135a

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.