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Category:   Application (Web Server/CGI)  >   Tomcat Vendors:   Apache Software Foundation
(Red Hat Issues Fix) Tomcat May Allow Remote Users to Conduct HTTP Response Smuggling Attacks
SecurityTracker Alert ID:  1018109
SecurityTracker URL:  http://securitytracker.com/id/1018109
CVE Reference:   CVE-2005-2090   (Links to External Site)
Date:  May 24 2007
Impact:   Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 4.1.24, 5.0.19
Description:   A potential vulnerability was reported in Apache Tomcat when used in conjunction with certain gateway and proxy servers. A remote user can conduct HTTP request smuggling attacks.

If the web server is used in conjunction with a proxy server or application gateway (e.g., cache, firewall) and if there is an input validation vulnerability in the web server or one of its applications, then a remote user can use HTTP request smuggling techniques to hijack a target user's request or conduct a variation of a cross-site scripting attack against a target user.

A remote user can send multiple HTTP requests with specially crafted HTTP headers to the target server via the proxy/gateway server. The requests may be interpreted differently by the target server than by the proxy/gateway server. As a result, unexpected results may occur. A remote user may be able to poison an intermediate cache, bypass application-level security features within an intermediate proxy/gateway server, or conduct cross-site scripting attacks against target users.

Networks that use Tomcat in conjunction with Internet Security and Acceleration Server, DeleGate, or Sun ONE proxy server may be affected. Other configurations may also be affected.

This vulnerability was reported by Watchfire.

A description of HTTP request smuggling attacks is available at:

http://www.watchfire.com/resources/HTTP-Request-Smuggling.pdf
Impact:   Depending on the associated proxy/gateway server used in conjunction with the target system, a remote user may be able to poison an intermediate cache, bypass application-level security features within an intermediate proxy/gateway server, or conduct cross-site scripting attacks against target users.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2007-0328.html
Vendor URL:  jakarta.apache.org/ (Links to External Site)
Cause:   State error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 3 2005 Tomcat May Allow Remote Users to Conduct HTTP Response Smuggling Attacks


 Source Message Contents
Date:  Thu, 24 May 2007 05:48:14 -0400
Subject:  [RHSA-2007:0328-01] Important: tomcat security update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Important: tomcat security update
Advisory ID:       RHSA-2007:0328-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2007-0328.html
Issue date:        2007-05-24
Updated on:        2007-05-24
Product:           Red Hat Developer Suite v.3
CVE Names:         CVE-2005-2090 CVE-2006-7195 CVE-2007-0450 
- ---------------------------------------------------------------------

1. Summary:

Updated tomcat packages that fix multiple security issues and a bug 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
Red Hat Developer Suite v.3 (ES v.4) - noarch
Red Hat Developer Suite v.3 (WS v.4) - noarch

3. Problem description:

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)

The implict-objects.jsp file distributed in the examples webapp displayed a
number of unfiltered header values. If the JSP examples are accessible,
this flaw could allow a remote attacker to perform cross-site scripting
attacks. (CVE-2006-7195)

Updated jakarta-commons-modeler packages which correct a bug when
used with Tomcat 5.5.23 are also included.

Users should upgrade to these erratum packages which contain an update to
Tomcat that resolves these issues.

4. Solution:

Note: /etc/tomcat5/web.xml has been updated to disable directory listing by
default.  If you have previously modified /etc/tomcat5/web.xml, this change
will not be made automatically and you should manually update the value for
the "listings" parameter to "false".  

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

237109 - CVE-2005-2090 multiple tomcat issues (CVE-2007-0450 CVE-2006-7195)

6. RPMs required:

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

SRPMS:
ftp://updates.redhat.com/enterprise/4AS-DS3/en/os/SRPMS/jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
4222be2605c1611c0fa35dbb6bd6e4f0  jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
ftp://updates.redhat.com/enterprise/4AS-DS3/en/os/SRPMS/tomcat5-5.5.23-0jpp_6rh.src.rpm
a5dd8945b03a8c0c95db79d58fbd3ca7  tomcat5-5.5.23-0jpp_6rh.src.rpm

noarch:
9390a4076d922b0de9560187e83a6f82  jakarta-commons-modeler-2.0-3jpp_3rh.noarch.rpm
a65422af787444bc997f561246e94348  tomcat5-5.5.23-0jpp_6rh.noarch.rpm
bfac8a20f267cf60b508bd3097827d3f  tomcat5-common-lib-5.5.23-0jpp_6rh.noarch.rpm
612d61b93903cfff32be17dc7faa733b  tomcat5-jasper-5.5.23-0jpp_6rh.noarch.rpm
6ad168cda6379b7c6c0348eb1fc6a52e  tomcat5-jsp-2.0-api-5.5.23-0jpp_6rh.noarch.rpm
41b2143aafc7986f8d7ae7b84eca9411  tomcat5-server-lib-5.5.23-0jpp_6rh.noarch.rpm
cf311e6fc560319b3581e6a1b80c81a6  tomcat5-servlet-2.4-api-5.5.23-0jpp_6rh.noarch.rpm

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

SRPMS:
ftp://updates.redhat.com/enterprise/4ES-DS3/en/os/SRPMS/jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
4222be2605c1611c0fa35dbb6bd6e4f0  jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
ftp://updates.redhat.com/enterprise/4ES-DS3/en/os/SRPMS/tomcat5-5.5.23-0jpp_6rh.src.rpm
a5dd8945b03a8c0c95db79d58fbd3ca7  tomcat5-5.5.23-0jpp_6rh.src.rpm

noarch:
9390a4076d922b0de9560187e83a6f82  jakarta-commons-modeler-2.0-3jpp_3rh.noarch.rpm
a65422af787444bc997f561246e94348  tomcat5-5.5.23-0jpp_6rh.noarch.rpm
bfac8a20f267cf60b508bd3097827d3f  tomcat5-common-lib-5.5.23-0jpp_6rh.noarch.rpm
612d61b93903cfff32be17dc7faa733b  tomcat5-jasper-5.5.23-0jpp_6rh.noarch.rpm
6ad168cda6379b7c6c0348eb1fc6a52e  tomcat5-jsp-2.0-api-5.5.23-0jpp_6rh.noarch.rpm
41b2143aafc7986f8d7ae7b84eca9411  tomcat5-server-lib-5.5.23-0jpp_6rh.noarch.rpm
cf311e6fc560319b3581e6a1b80c81a6  tomcat5-servlet-2.4-api-5.5.23-0jpp_6rh.noarch.rpm

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

SRPMS:
ftp://updates.redhat.com/enterprise/4WS-DS3/en/os/SRPMS/jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
4222be2605c1611c0fa35dbb6bd6e4f0  jakarta-commons-modeler-2.0-3jpp_3rh.src.rpm
ftp://updates.redhat.com/enterprise/4WS-DS3/en/os/SRPMS/tomcat5-5.5.23-0jpp_6rh.src.rpm
a5dd8945b03a8c0c95db79d58fbd3ca7  tomcat5-5.5.23-0jpp_6rh.src.rpm

noarch:
9390a4076d922b0de9560187e83a6f82  jakarta-commons-modeler-2.0-3jpp_3rh.noarch.rpm
a65422af787444bc997f561246e94348  tomcat5-5.5.23-0jpp_6rh.noarch.rpm
bfac8a20f267cf60b508bd3097827d3f  tomcat5-common-lib-5.5.23-0jpp_6rh.noarch.rpm
612d61b93903cfff32be17dc7faa733b  tomcat5-jasper-5.5.23-0jpp_6rh.noarch.rpm
6ad168cda6379b7c6c0348eb1fc6a52e  tomcat5-jsp-2.0-api-5.5.23-0jpp_6rh.noarch.rpm
41b2143aafc7986f8d7ae7b84eca9411  tomcat5-server-lib-5.5.23-0jpp_6rh.noarch.rpm
cf311e6fc560319b3581e6a1b80c81a6  tomcat5-servlet-2.4-api-5.5.23-0jpp_6rh.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2090
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-7195
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0450
http://tomcat.apache.org/security-5.html
http://www.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2007 Red Hat, Inc.
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