Debian DSA-2903-1 : strongswan - security update

medium Nessus Plugin ID 73501

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Synopsis

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

Description

An authentication bypass vulnerability was found in charon, the daemon handling IKEv2 in strongSwan, an IKE/IPsec suite. The state machine handling the security association (IKE_SA) handled some state transitions incorrectly.

An attacker can trigger the vulnerability by rekeying an unestablished IKE_SA during the initiation itself. This will trick the IKE_SA state to'established' without the need to provide any valid credential.

Vulnerable setups include those actively initiating IKEv2 IKE_SA (like 'clients' or 'roadwarriors') but also during re-authentication (which can be initiated by the responder). Installations using IKEv1 (pluto daemon in strongSwan 4 and earlier, and IKEv1 code in charon 5.x) is not affected.

Solution

Upgrade the strongswan packages.

For the oldstable distribution (squeeze), this problem has been fixed in version 4.4.1-5.5.

For the stable distribution (wheezy), this problem has been fixed in version 4.5.2-1.5+deb7u3.

Plugin Details

Severity: Medium

ID: 73501

File Name: debian_DSA-2903.nasl

Version: 1.9

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 4/15/2014

Updated: 1/11/2021

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.0

CVSS v2

Risk Factor: Medium

Base Score: 6.4

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

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: 4/14/2014

Reference Information

CVE: CVE-2014-2338

DSA: 2903

Detections

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