[ GLSA 200406-20 ] FreeS/WAN, Openswan, strongSwan: Vulnerabilities in certificate handling

[GLSA]

Gentoo Linux Security Advisory

Title: FreeS/WAN, Openswan, strongSwan: Vulnerabilities in certificate handling (GLSA 200406-20)
Severity: normal
Exploitable: remote
Date: June 25, 2004
Updated: May 22, 2006
ID: 200406-20

Synopsis

FreeS/WAN, Openswan, strongSwan and Super-FreeS/WAN contain two bugs when authenticating PKCS#7 certificates. This could allow an attacker to authenticate with a fake certificate.

Background

FreeS/WAN, Openswan, strongSwan and Super-FreeS/WAN are Open Source implementations of IPsec for the Linux operating system. They are all based on the discontinued FreeS/WAN project.

Affected Packages

Package: net-misc/freeswan
Vulnerable: < 2.04-r1
Unaffected: >= 2.04-r1
Unaffected: = 1.99-r1
Architectures: All supported architectures

Package: net-misc/openswan
Vulnerable: < 2.1.4
Unaffected: >= 2.1.4
Unaffected: = 1.0.6_rc1
Architectures: All supported architectures

Package: net-misc/strongswan
Vulnerable: < 2.1.3
Unaffected: >= 2.1.3
Architectures: All supported architectures

Package: net-misc/super-freeswan
Vulnerable: <= 1.99.7.3
Architectures: All supported architectures


Description

All these IPsec implementations have several bugs in the verify_x509cert() function, which performs certificate validation, that make them vulnerable to malicious PKCS#7 wrapped objects.

Impact

With a carefully crafted certificate payload an attacker can successfully authenticate against FreeS/WAN, Openswan, strongSwan or Super-FreeS/WAN, or make the daemon go into an endless loop.

Workaround

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version.

Resolution

All FreeS/WAN 1.9x users should upgrade to the latest stable version: