CVE-2024-3652 | IKEv1 default AH/ESP responder can cause libreswan to abort and restart

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.

Published: 2024-04-11 Last update: 2025-06-17 Assigner: d42dc95b-23f1-4e06-9076-20753a0fb0df Source: d42dc95b-23f1-4e06-9076-20753a0fb0df
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-3652 is rated Low Risk (27.5/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.02%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-3652

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.33% 0.02% -0.31%
2 2025-11-18 0.03% 0.33% +0.30%
3 2025-05-20 — 0.03% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-3652

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-3652

OS Trackers for CVE-2024-3652

vendor priority summary link
alpine — CVE-2024-3652: 1 source package rows (libreswan); 17 state rows across 5 repos (3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 6, open 11. https://security.alpinelinux.org/vuln/CVE-2024-3652
debian end-of-life CVE-2024-3652 end-of-life priority: Debian including 1 source packages (libreswan), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2024-3652
redhat medium — https://access.redhat.com/security/cve/CVE-2024-3652
ubuntu medium CVE-2024-3652 medium priority: Ubuntu including 1 source packages (libreswan), 9 status rows across 9 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, upstream): needs-triage 6, ignored 3. https://ubuntu.com/security/CVE-2024-3652

Affected software / configurations for CVE-2024-3652

Vendor Product Version Raw CPE
libreswan libreswan >= 3.22, < 4.15 cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*

References for CVE-2024-3652

cvelogic Threat Intelligence