Authentication bypass in Sympa

1) Improper authentication

EUVDB-ID: #VU101798

Risk: High

CVSSv4.0: 6.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-55919

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 in the generic SSO login feature. A remote attacker can bypass authentication process with an arbitrary email address and gain unauthorized access to the application.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Sympa: 6.2 - 6.2.72

CPE2.3

• cpe:2.3:a:sympa_org:sympa:6.2:*:*:*:*:*:*:*
• cpe:2.3:a:sympa_org:sympa:6.2a.0:*:*:*:*:*:*:*
• cpe:2.3:a:sympa_org:sympa:6.2a.2:*:*:*:*:*:*:*

External links

https://www.sympa.community/security/2024-001.html
https://github.com/sympa-community/sympa/releases/tag/6.2.74

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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