[ GLSA 200509-12 ] Apache, mod_ssl: Multiple vulnerabilities

[GLSA]

Gentoo Linux Security Advisory

Title: Apache, mod_ssl: Multiple vulnerabilities (GLSA 200509-12)
Severity: normal
Exploitable: remote and local
Date: September 19, 2005
Updated: December 30, 2007
Bug(s): #103554, #104807
ID: 200509-12

Synopsis

mod_ssl and Apache are vulnerable to a restriction bypass and a potential local privilege escalation.

Background

The Apache HTTP server is one of the most popular web servers on the Internet. mod_ssl provides SSL v2/v3 and TLS v1 support for Apache 1.3 and is also included in Apache 2.

Affected Packages

Package: net-www/mod_ssl
Vulnerable: < 2.8.24
Unaffected: >= 2.8.24
Architectures: All supported architectures

Package: www-servers/apache
Vulnerable: < 2.0.54-r15
Unaffected: >= 2.0.54-r15
Unaffected: < 2
Architectures: All supported architectures


Description

mod_ssl contains a security issue when "SSLVerifyClient optional" is configured in the global virtual host configuration (CAN-2005-2700). Also, Apache's httpd includes a PCRE library, which makes it vulnerable to an integer overflow (CAN-2005-2491).

Impact

Under a specific configuration, mod_ssl does not properly enforce the client-based certificate authentication directive, "SSLVerifyClient require", in a per-location context, which could be potentially used by a remote attacker to bypass some restrictions. By creating a specially crafted ".htaccess" file, a local attacker could possibly exploit Apache's vulnerability, which would result in a local privilege escalation.

Workaround

There is no known workaround at this time.

Resolution

All mod_ssl users should upgrade to the latest version: