Apache JK Tomcat Connector: Remote execution of arbitrary code

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200703-16 / mod_jk
Release Date	March 16, 2007
Latest Revision	March 16, 2007: 01
Impact	high
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
www-apache/mod_jk	< 1.2.21-r1	>= 1.2.21-r1	All supported architectures

Related bugreports: #169433

Synopsis

The Apache Tomcat Connector (mod_jk) contains a buffer overflow vulnerability that could result in the remote execution of arbitrary code.

2. Impact Information

Background

The Apache HTTP server is a very widely used web server. mod_jk provides the JK module for connecting Tomcat and Apache using the ajp13 protocol.

Description

ZDI reported an unsafe memory copy in mod_jk that was discovered by an anonymous researcher in the map_uri_to_worker function of native/common/jk_uri_worker_map.c .

Impact

A remote attacker can send a long URL request to an Apache server using Tomcat. That can trigger the vulnerability and lead to a stack-based buffer overflow, which could result in the execution of arbitrary code with the permissions of the Apache user.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All Apache Tomcat users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apache/mod_jk-1.2.21-r1"

4. References

CVE-2007-0774

Page updated March 16, 2007

Summary: This is a Gentoo Linux Security Advisory

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