Error Handling in libreswan - CVE-2024-2357

Vulnerability identifier: #VU87342

CSH Severity: Low

CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear

CVE-ID: CVE-2024-2357

CWE-ID: CWE-388

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: libreswan.org

Affected software:
libreswan

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect handling of a missing PreSharedKey when  a connection is configured to use reSharedKeys (authby=secret) and the connection cannot find a matching configured secret. When such a connection is automatically added on startup sing the auto= keyword, it can cause repeated crashes leading to a denial of service.

Install updates from vendor's website.

• https://libreswan.org/security/CVE-2024-2357
• https://github.com/libreswan/libreswan/releases/tag/v4.13