Apache: Multiple vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200602-03 / Apache
Release Date	February 06, 2006
Latest Revision	December 30, 2007: 03
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-servers/apache	< 2.0.55-r1	>= 2.0.55-r1, revision >= 2.0.54-r16, = 1.3.34-r2, revision >= 1.3.34-r11, revision >= 1.3.37	All supported architectures

Related bugreports: #115324, #118875

Synopsis

Apache can be exploited for cross-site scripting attacks and is vulnerable to a Denial of Service attack.

2. Impact Information

Background

The Apache HTTP server is one of the most popular web servers on the Internet. mod_imap provides support for server-side image maps; mod_ssl provides secure HTTP connections.

Description

Apache's mod_imap fails to properly sanitize the "Referer" directive of imagemaps in some cases, leaving the HTTP Referer header unescaped. A flaw in mod_ssl can lead to a NULL pointer dereference if the site uses a custom "Error 400" document. These vulnerabilities were reported by Marc Cox and Hartmut Keil, respectively.

Impact

A remote attacker could exploit mod_imap to inject arbitrary HTML or JavaScript into a user's browser to gather sensitive information. Attackers could also cause a Denial of Service on hosts using the SSL module (Apache 2.0.x only).

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Apache users should upgrade to the latest version, depending on whether they still use the old configuration style (/etc/apache/conf/*.conf) or the new one (/etc/apache2/httpd.conf).

2.0.x users, new style config:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-servers/apache-2.0.55-r1"

2.0.x users, old style config:

Code Listing 3.2: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose "=www-servers/apache-2.0.54-r16"

1.x users, new style config:

Code Listing 3.3: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose "=www-servers/apache-1.3.34-r11"

1.x users, old style config:

Code Listing 3.4: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose "=www-servers/apache-1.3.34-r2"

4. References

Page updated February 06, 2006

Summary: This is a Gentoo Linux Security Advisory

Security Team
Contact Address

Donate to support our development efforts.