Debian DSA-2789-1 : strongswan - Denial of service and authorization bypass

medium Nessus Plugin ID 70733

Synopsis

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

Description

A vulnerability has been found in the ASN.1 parser of strongSwan, an IKE daemon used to establish IPsec protected links.

By sending a crafted ID_DER_ASN1_DN ID payload to a vulnerable pluto or charon daemon, a malicious remote user can provoke a denial of service (daemon crash) or an authorization bypass (impersonating a different user, potentially acquiring VPN permissions she doesn't have).

Solution

Upgrade the strongswan packages.

For the oldstable distribution (squeeze), this problem has been fixed in version 4.4.1-5.4.

For the stable distribution (wheezy), this problem has been fixed in version 4.5.2-1.5+deb7u2.

See Also

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

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

https://www.debian.org/security/2013/dsa-2789

Plugin Details

Severity: Medium

ID: 70733

File Name: debian_DSA-2789.nasl

Version: 1.9

Type: local

Agent: unix

Published: 11/2/2013

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:strongswan, cpe:/o:debian:debian_linux:6.0, cpe:/o:debian:debian_linux:7.0

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

Patch Publication Date: 11/1/2013

Reference Information

CVE: CVE-2013-6075

DSA: 2789