Debian DLA-1528-1 : strongswan security update

high Nessus Plugin ID 117889


The remote Debian host is missing a security update.


It was discovered that there was a denial of service vulnerability in strongswan, a virtual private network (VPN) client and server.

Verification of an RSA signature with a very short public key caused an integer underflow in a length check that resulted in a heap buffer overflow.

For Debian 8 'Jessie', this issue has been fixed in strongswan version 5.2.1-6+deb8u8.

We recommend that you upgrade your strongswan packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Upgrade the affected packages.

See Also

Plugin Details

Severity: High

ID: 117889

File Name: debian_DLA-1528.nasl

Version: 1.4

Type: local

Agent: unix

Published: 10/3/2018

Updated: 1/11/2021

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

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P


Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:charon-cmd, p-cpe:/a:debian:debian_linux:libcharon-extra-plugins, p-cpe:/a:debian:debian_linux:libstrongswan, p-cpe:/a:debian:debian_linux:libstrongswan-extra-plugins, p-cpe:/a:debian:debian_linux:libstrongswan-standard-plugins, p-cpe:/a:debian:debian_linux:strongswan, p-cpe:/a:debian:debian_linux:strongswan-charon, p-cpe:/a:debian:debian_linux:strongswan-dbg, p-cpe:/a:debian:debian_linux:strongswan-ike, p-cpe:/a:debian:debian_linux:strongswan-ikev1, p-cpe:/a:debian:debian_linux:strongswan-ikev2, p-cpe:/a:debian:debian_linux:strongswan-libcharon, p-cpe:/a:debian:debian_linux:strongswan-nm, p-cpe:/a:debian:debian_linux:strongswan-starter, cpe:/o:debian:debian_linux:8.0

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

Patch Publication Date: 10/2/2018

Reference Information

CVE: CVE-2018-17540