CVE-2024-3652

IKEv1 default AH/ESP responder can cause libreswan to abort and restart

State: Published
Severity: 6.5 Medium
Published: Apr 11, 2024
Updated: Feb 27, 2026
Reserved: Apr 11, 2024

Description

The Libreswan Project was notified of an issue causing libreswan to restart when using IKEv1 without specifying an esp= line. When the peer requests AES-GMAC, libreswan's default proposal handler causes an assertion failure and crashes and restarts. IKEv2 connections are not affected.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-404 Improper Resource Shutdown or Release

Affected Products

Product	Versions
libreswanThe Libreswan Project (www.libreswan.org)	3.22 through 4.14Affected 5.0Not affected

References

CVE-2024-3652vendor-advisory
http://www.openwall.com/lists/oss-security/2024/04/18/2

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