mod_auth_pgsql: Multiple format string vulnerabilities

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200601-05 / mod_auth_pgsql
Release Date	January 10, 2006
Latest Revision	December 30, 2007: 03
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apache/mod_auth_pgsql	< 2.0.3	>= 2.0.3, < 1.0.0	All supported architectures

Related bugreports: #118096

Synopsis

Format string vulnerabilities in mod_auth_pgsql may lead to the execution of arbitrary code.

2. Impact Information

Background

mod_auth_pgsql is an Apache2 module that allows user authentication against a PostgreSQL database.

Description

The error logging functions of mod_auth_pgsql fail to validate certain strings before passing them to syslog, resulting in format string vulnerabilities.

Impact

An unauthenticated remote attacker could exploit these vulnerabilities to execute arbitrary code with the rights of the user running the Apache2 server by sending specially crafted login names.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All mod_auth_pgsql users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_auth_pgsql-2.0.3"

4. References

Page updated January 10, 2006

Summary: This is a Gentoo Linux Security Advisory

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