(RHSA-2007:0326) Important: tomcat security update

Tomcat is a servlet container for Java Servlet and JavaServer Pages
technologies.

Tomcat was found to accept multiple content-length headers in a
request. This could allow attackers to poison a web-cache, bypass web
application firewall protection, or conduct cross-site scripting attacks.
(CVE-2005-2090)

Tomcat permitted various characters as path delimiters. If Tomcat was used
behind certain proxies and configured to only proxy some contexts, an
attacker could construct an HTTP request to work around the context
restriction and potentially access non-proxied content. (CVE-2007-0450)

Several applications distributed in the JSP examples displayed unfiltered
values. If the JSP examples are accessible, these flaws could allow a
remote attacker to perform cross-site scripting attacks. (CVE-2006-7195,
CVE-2006-7196)

The default Tomcat configuration permitted the use of insecure
SSL cipher suites including the anonymous cipher suite. (CVE-2007-1858)

Directory listings were enabled by default in Tomcat. Information stored
unprotected under the document root was visible to anyone if the
administrator did not disable directory listings. (CVE-2006-3835)

Users should upgrade to these erratum packages which contain Tomcat version
5.5.23 that resolves these issues. Updated jakarta-commons-modeler
packages are also included which correct a bug when used with Tomcat 5.5.23.