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Apache JK Tomcat Connector: Remote execution of arbitrary code


1.  Gentoo Linux Security Advisory

Version Information

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


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

2.  Impact Information


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.


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 .


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


There is no known workaround at this time.


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


Page updated March 16, 2007

Summary: This is a Gentoo Linux Security Advisory

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