Updated mod_jk packages that fix a security issue are now available for Red
Hat Application Stack v1.1.
This update has been rated as having Important security impact by the Red
Hat Security Response Team.
mod_jk is a Tomcat connector that can be used to communicate between Tomcat
and the Apache HTTP Server 2. mod_jk was first distributed with Red Hat
Application Stack version 1.1 released on 19 February 2007.
Versions of mod_jk before 1.2.23 decoded request URLs by default inside
Apache httpd and forwarded the encoded URL to Tomcat, which itself did a
second decoding. If Tomcat was used behind mod_jk and configured to only
proxy some contexts, an attacker could construct a carefully crafted HTTP
request to work around the context restriction and potentially access
non-proxied content (CVE-2007-1860).
Users of mod_jk should upgrade to these updated packages, which address
this issue by changing the default so mod_jk forwards the original
unchanged request URL to Tomcat.