[ GLSA 200407-18 ] mod_ssl: Format string vulnerability

[GLSA]

Gentoo Linux Security Advisory

Title: mod_ssl: Format string vulnerability (GLSA 200407-18)
Severity: normal
Exploitable: remote
Date: July 22, 2004
Bug(s): #57379
ID: 200407-18

Synopsis

A bug in mod_ssl may allow a remote attacker to execute arbitrary code when Apache is configured to use mod_ssl and mod_proxy.

Background

mod_ssl provides Secure Sockets Layer encryption and authentication to Apache 1.3.

Affected Packages

Package: net-www/mod_ssl
Vulnerable: <= 2.8.18
Unaffected: >= 2.8.19
Architectures: All supported architectures


Description

A bug in ssl_engine_ext.c makes mod_ssl vulnerable to a ssl_log() related format string vulnerability in the mod_proxy hook functions.

Impact

Given the right server configuration, an attacker could execute code as the user running Apache, usually "apache".

Workaround

A server should not be vulnerable if it is not using both mod_ssl and mod_proxy. Otherwise there is no workaround other than to disable mod_ssl.

Resolution

All mod_ssl users should upgrade to the latest version: