Denial of service in libreswan

1) Reachable assertion

EUVDB-ID: #VU88534

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-3652

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion within the compute_proto_keymat() function when handling IKEv1 packets within the default AH/ESP responder. A remote authenticated user can send specially crafted packets to the server and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

libreswan: 3.22 - 4.14

CPE2.3

• cpe:2.3:a:libreswan.org:libreswan:3.22:*:*:*:*:*:*:*
• cpe:2.3:a:libreswan.org:libreswan:3.23:*:*:*:*:*:*:*
• cpe:2.3:a:libreswan.org:libreswan:3.25:*:*:*:*:*:*:*

External links

https://libreswan.org/security/CVE-2024-3652
https://github.com/libreswan/libreswan/releases/tag/v4.15

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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