CVE-2024-2357

IKEv2 misconfiguration can cause libreswan to abort and restart

MEDIUM
6.5
CVSS Score
Published: March 11, 2024 at 07:39 PM UTC
Updated: June 17, 2026 at 07:24 AM UTC
1 product affected across 1 vendorLibreswan

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1.0%
SSVC
No known exploit

Description

The Libreswan Project was notified of an issue causing libreswan to restart under some IKEv2 retransmit scenarios when a connection is configured to use PreSharedKeys (authby=secret) and the connection cannot find a matching configured secret. When such a connection is automatically added on startup using the auto= keyword, it can cause repeated crashes leading to a Denial of Service.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4.2 ≤ v ≤ 4.124.2
Vendor states this is fixed in 3.0 (unaffected)
Vendor states this is fixed in 5.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED

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