CVE-2024-3652Public exploitNetwork attack vector

Authenticated daemon restart via AES-GMAC proposal

Published Apr 11, 2024 · Updated Feb 27, 2026

Denial of service in The Libreswan Project's Libreswan 3.22 through 4.14 allows remote authenticated users to restart the IKE daemon via Quick Mode. In compute_proto_keymat(), an unexpected AES-GMAC transform produces zero-length encryption key material, but processing continues into a key-length assertion that aborts the daemon. Exploitation requires successful IKEv1 peer authentication and a connection with no esp= setting; automatically loaded connections can enter repeated restart cycles, while IKEv2 is unaffected.

CVSS severity6.5
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in The Libreswan Project's Libreswan 3.22 through 4.14 allows remote authenticated users to restart the IKE daemon via Quick Mode. In compute_proto_keymat(), an unexpected AES-GMAC transform produces zero-length encryption key material, but processing continues into a key-length assertion that aborts the daemon. Exploitation requires successful IKEv1 peer authentication and a connection with no esp= setting; automatically loaded connections can enter repeated restart cycles, while IKEv2 is unaffected.

The record

CVE
CVE-2024-3652
Published
Apr 11, 2024
Updated
Feb 27, 2026
Vendor
The Libreswan Project
Product
Libreswan
Classifications
CWE-404, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.22 <=4.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Libreswan Project · Libreswanversion=3.22 <=4.14

Published CVSS scores

6.5CISA ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-404Improper Resource Shutdown or Release
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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