GLSA 200509-12: Apache, mod_ssl: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Apache, mod_ssl: Multiple vulnerabilities
Date:	09/19/2005
Bugs:	#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	Vulnerable	Unaffected	Architecture(s)
net-www/mod_ssl	< 2.8.24	>= 2.8.24	All supported architectures
www-servers/apache	< 2.0.54-r15	>= 2.0.54-r15	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:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-www/mod_ssl-2.8.24"

All Apache 2 users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=www-servers/apache-2.0.54-r15"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200509-12.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.