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Debian DSA-5560-1 : strongswan - security update

critical Nessus Plugin ID 186027

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Synopsis

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

Description

The remote Debian 11 / 12 host has packages installed that are affected by a vulnerability as referenced in the dsa-5560 advisory.

 Florian Picca reported a bug in the charon-tkm daemon in strongSwan an IKE/IPsec suite. The TKM-backed version of the charon IKE daemon (charon-tkm) doesn't check the length of received Diffie-Hellman public values before copying them to a fixed-size buffer on the stack, causing a buffer overflow that could potentially be exploited for remote code execution by sending a specially crafted and unauthenticated IKE_SA_INIT message. For the oldstable distribution (bullseye), this problem has been fixed in version 5.9.1-1+deb11u4. For the stable distribution (bookworm), this problem has been fixed in version 5.9.8-5+deb12u1. We recommend that you upgrade your strongswan packages. For the detailed security status of strongswan please refer to its security tracker page at: https://security- tracker.debian.org/tracker/strongswan

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 strongswan packages.

For the stable distribution (bookworm), this problem has been fixed in version 5.9.8-5+deb12u1.

See Also

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

https://www.debian.org/security/2023/dsa-5560

https://security-tracker.debian.org/tracker/CVE-2023-41913

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

https://packages.debian.org/source/bookworm/strongswan

Plugin Details

Severity: Critical

ID: 186027

File Name: debian_DSA-5560.nasl

Version: 1.2

Type: local

Agent: unix

Published: 11/21/2023

Updated: 1/24/2025

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2023-41913

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.1

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, p-cpe:/a:debian:debian_linux:strongswan-starter, p-cpe:/a:debian:debian_linux:strongswan-charon, p-cpe:/a:debian:debian_linux:charon-systemd, p-cpe:/a:debian:debian_linux:strongswan-scepclient, p-cpe:/a:debian:debian_linux:libcharon-extra-plugins, p-cpe:/a:debian:debian_linux:libstrongswan-standard-plugins, p-cpe:/a:debian:debian_linux:libstrongswan-extra-plugins, p-cpe:/a:debian:debian_linux:strongswan-nm, p-cpe:/a:debian:debian_linux:charon-cmd, p-cpe:/a:debian:debian_linux:strongswan-pki, p-cpe:/a:debian:debian_linux:strongswan-libcharon, p-cpe:/a:debian:debian_linux:libcharon-extauth-plugins, p-cpe:/a:debian:debian_linux:strongswan, p-cpe:/a:debian:debian_linux:libstrongswan, cpe:/o:debian:debian_linux:12.0, p-cpe:/a:debian:debian_linux:strongswan-swanctl

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/20/2023

Vulnerability Publication Date: 11/20/2023

Reference Information

CVE: CVE-2023-41913