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[RHSA-2009:1563-01] Important: tomcat security update

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                   Red Hat Security Advisory

Synopsis:          Important: tomcat security update
Advisory ID:       RHSA-2009:1563-01
Product:           Red Hat Developer Suite v.3
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-1563.html
Issue date:        2009-11-09
CVE Names:         CVE-2007-5333 CVE-2008-5515 CVE-2009-0033 
                   CVE-2009-0580 CVE-2009-0783 

1. Summary:

Updated tomcat packages that fix several security issues are now available
for Red Hat Developer Suite 3.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Developer Suite v.3 (AS v.4) - noarch

3. Description:

Apache Tomcat is a servlet container for the Java Servlet and JavaServer
Pages (JSP) technologies.

It was discovered that the Red Hat Security Advisory RHSA-2008:0195 did not
address all possible flaws in the way Tomcat handles certain characters and
character sequences in cookie values. A remote attacker could use this flaw
to obtain sensitive information, such as session IDs, and then use this
information for session hijacking attacks. (CVE-2007-5333)

Note: The fix for the CVE-2007-5333 flaw changes the default cookie
processing behavior: With this update, version 0 cookies that contain
values that must be quoted to be valid are automatically changed to version
1 cookies. To reactivate the previous, but insecure behavior, add the
following entry to the "/etc/tomcat5/catalina.properties" file:


It was discovered that request dispatchers did not properly normalize user
requests that have trailing query strings, allowing remote attackers to
send specially-crafted requests that would cause an information leak.

A flaw was found in the way the Tomcat AJP (Apache JServ Protocol)
connector processes AJP connections. An attacker could use this flaw to
send specially-crafted requests that would cause a temporary denial of
service. (CVE-2009-0033)

It was discovered that the error checking methods of certain authentication
classes did not have sufficient error checking, allowing remote attackers
to enumerate (via brute force methods) usernames registered with
applications running on Tomcat when FORM-based authentication was used.

It was discovered that web applications containing their own XML parsers
could replace the XML parser Tomcat uses to parse configuration files. A
malicious web application running on a Tomcat instance could read or,
potentially, modify the configuration and XML-based data of other web
applications deployed on the same Tomcat instance. (CVE-2009-0783)

Users of Tomcat should upgrade to these updated packages, which contain
backported patches to resolve these issues. Tomcat must be restarted for
this update to take effect.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network.  Details on how to use 
the Red Hat Network to apply this update are available at

5. Bugs fixed (http://bugzilla.redhat.com/):

427766 - CVE-2007-5333 Improve cookie parsing for tomcat5
493381 - CVE-2009-0033 tomcat6 Denial-Of-Service with AJP connection
503978 - CVE-2009-0580 tomcat6 Information disclosure in authentication classes
504153 - CVE-2009-0783 tomcat XML parser information disclosure
504753 - CVE-2008-5515 tomcat request dispatcher information disclosure vulnerability

6. Package List:

Red Hat Developer Suite v.3 (AS v.4):



These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from

7. References:


8. Contact:

The Red Hat security contact is <secalert redhat com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
Version: GnuPG v1.4.4 (GNU/Linux)


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