RHSA-2007:0360-01 Important: jbossas security update
Posted on: 05/24/2007 09:50 PM

A new update is available for Red Hat Enterprise Linux. Here the announcement:

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Red Hat Security Advisory

Synopsis: Important: jbossas security update
Advisory ID: RHSA-2007:0360-01
Advisory URL: https://rhn.redhat.com/errata/RHSA-2007-0360.html
Issue date: 2007-05-24
Updated on: 2007-05-24
Product: Red Hat Application Stack
CVE Names: CVE-2005-2090 CVE-2007-0450
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1. Summary:

Updated jbossas packages that fix multiple security issues in tomcat are
now available for Red Hat Application Stack.

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

2. Relevant releases/architectures:

Red Hat Application Stack v1 for Enterprise Linux AS (v.4) - noarch
Red Hat Application Stack v1 for Enterprise Linux ES (v.4) - noarch

3. Problem description:

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

This update addresses the following issues:

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)

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

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".

Note: In response to CVE-2007-0450, JBoss AS considers encoded slashes and
backslashes in URLs invalid and its usage will result in HTTP 400 error. It
is possible to allow encoded slashes and backslashes by following the steps
outlined below, however doing so will expose you to CVE-2007-0450 related
attacks:

a) If you use the /var/lib/jbossas/bin/run.sh setup, please edit
/etc/jbossas/run.conf and append
- -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true
- -Dorg.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH=true to the
string assigned to JAVA_OPTS

b) If you use the init script setup to run multiple JBoss AS services and
you wish to allow encoding by default on all services, please edit
/etc/jbossas/jbossas.conf and add the line JAVA_OPTS="${JAVA_OPTS}
- -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true
- -Dorg.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH=true"

c) If you use the init script setup to run multiple JBoss AS services and
want to allow encoding of slashes and backslashes for a particular service,
please edit /etc/sysconfig/${NAME} (where NAME is the name of your service)
and add the line JAVA_OPTS="${JAVA_OPTS}
- -Dorg.apache.tomcat.util.buf.UDecoder.ALLOW_ENCODED_SLASH=true
- -Dorg.apache.catalina.connector.CoyoteAdapter.ALLOW_BACKSLASH=true"

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
http://kbase.redhat.com/faq/FAQ_58_10188

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

238574 - CVE-2005-2090 multiple tomcat issues (CVE-2007-0450)

6. RPMs required:

Red Hat Application Stack v1 for Enterprise Linux AS (v.4):

SRPMS:
ftp://updates.redhat.com/enterprise/4AS/en/RHWAS/SRPMS/jbossas-4.0.5-2.CP04.el4s1.2.src.rpm
1b4126e20b4e29398016f8b68cb6cef9 jbossas-4.0.5-2.CP04.el4s1.2.src.rpm
ftp://updates.redhat.com/enterprise/4AS/en/RHWAS/SRPMS/jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.src.rpm
07a3c0fc01b59cce76d0f329358e5ee2 jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.src.rpm

noarch:
4b20eab75fad0a8e88eaa87fa720e216 jbossas-4.0.5-2.CP04.el4s1.2.noarch.rpm
ad000c590574219c32649e2f7d6475ff jbossas-core-4.0.5-2.CP04.el4s1.2.noarch.rpm
2690014231347df9c2d827f05404f080 jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.noarch.rpm

Red Hat Application Stack v1 for Enterprise Linux ES (v.4):

SRPMS:
ftp://updates.redhat.com/enterprise/4ES/en/RHWAS/SRPMS/jbossas-4.0.5-2.CP04.el4s1.2.src.rpm
1b4126e20b4e29398016f8b68cb6cef9 jbossas-4.0.5-2.CP04.el4s1.2.src.rpm
ftp://updates.redhat.com/enterprise/4ES/en/RHWAS/SRPMS/jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.src.rpm
07a3c0fc01b59cce76d0f329358e5ee2 jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.src.rpm

noarch:
4b20eab75fad0a8e88eaa87fa720e216 jbossas-4.0.5-2.CP04.el4s1.2.noarch.rpm
ad000c590574219c32649e2f7d6475ff jbossas-core-4.0.5-2.CP04.el4s1.2.noarch.rpm
2690014231347df9c2d827f05404f080 jbossas-ejb3-1.0.0-0.2.rc9.CP04.el4s1.2.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-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 lt;secalert@redhat.comgt;. More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2007 Red Hat, Inc.
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