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Vulnerability record · CVE-2023-30570 · published 29 May 2023

CVE-2023-30570: Libreswan uncontrolled resource consumption vulnerability

Libreswan · Libreswan

pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

7.5 CVSS 3.1 High EPSS 1.2% · top 33.4% CWE-400 · Uncontrolled resource consumption
7.5CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

pluto in Libreswan before 4.11 allows a denial of service (responder SPI mishandling and daemon crash) via unauthenticated IKEv1 Aggressive Mode packets. The earliest affected version is 3.28.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://libreswan.org/security/CVE-2023-30570/CVE-2023-30570.txt MitigationVendor Advisory
https://libreswan.org/security/CVE-2023-30570/CVE-2023-30570.txt MitigationVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2013-7283Libreswan race condition vulnerabilityRace condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora packages in libreswan 3.6 has unspecified impact and attack…EPSS 1.6%7.5CVE-2026-12413Libreswan vulnerabilityAn invalidly formatted IKEv2 fragment causes the Libreswan pluto daemon to crash and restart. Continued exploitation would cause a denial of service.…EPSS 0.60%7.5CVE-2023-2295Libreswan uncontrolled resource consumption vulnerabilityA vulnerability was found in the libreswan library. This security issue occurs when an IKEv1 Aggressive Mode packet is received with only unacceptabl…EPSS 1.6%7.5CVE-2022-23094Libreswan null pointer dereference vulnerabilityLibreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet…EPSS 2.5%7.5CVE-2020-1763Libreswan out-of-bounds read vulnerabilityAn out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could us…EPSS 3.6%7.5CVE-2019-12312Libreswan null pointer dereference vulnerabilityIn Libreswan 3.27 an assertion failure can lead to a pluto IKE daemon restart. An attacker can trigger a NULL pointer dereference by initiating an IK…EPSS 2.7%7.5CVE-2016-5391Libreswan null pointer dereference vulnerabilitylibreswan before 3.18 allows remote attackers to cause a denial of service (NULL pointer dereference and pluto daemon restart).EPSS 3.0%7.5CVE-2016-5361Libreswan improper input validation vulnerabilityprograms/pluto/ikev1.c in libreswan before 3.17 retransmits in initial-responder states, which allows remote attackers to cause a denial of service (…EPSS 2.7%

Source: NIST National Vulnerability Database (record CVE-2023-30570), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.