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Debian DSA-5368-1 : libreswan - security update

medium Nessus Plugin ID 172090

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 11 host has a package installed that is affected by a vulnerability as referenced in the dsa-5368 advisory.

 It was discovered that the libreswan IPsec implementation could be forced into a crash/restart via malformed IKEv2 packets after peer authentication, resulting in denial of service. For the stable distribution (bullseye), this problem has been fixed in version 4.3-1+deb11u3. We recommend that you upgrade your libreswan packages. For the detailed security status of libreswan please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libreswan

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the libreswan packages.

For the stable distribution (bullseye), this problem has been fixed in version 4.3-1+deb11u3.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1031821

https://security-tracker.debian.org/tracker/source-package/libreswan

https://www.debian.org/security/2023/dsa-5368

https://security-tracker.debian.org/tracker/CVE-2023-23009

https://packages.debian.org/source/bullseye/libreswan

Plugin Details

Severity: Medium

ID: 172090

File Name: debian_DSA-5368.nasl

Version: 1.3

Type: local

Agent: unix

Published: 3/3/2023

Updated: 1/24/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2023-23009

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:libreswan

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/3/2023

Vulnerability Publication Date: 2/21/2023

Reference Information

CVE: CVE-2023-23009