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Red Hat Security Advisory 2013-0267-01

Red Hat Security Advisory 2013-0267-01
Posted Feb 19, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0267-01 - Apache Tomcat is a servlet container. It was found that sending a request without a session identifier to a protected resource could bypass the Cross-Site Request Forgery prevention filter. A remote attacker could use this flaw to perform CSRF attacks against applications that rely on the CSRF prevention filter and do not contain internal mitigation for CSRF. Warning: Before applying the update, back up your existing JBoss Enterprise Web Server installation .

tags | advisory, remote, web, csrf
systems | linux, redhat
advisories | CVE-2012-4431
MD5 | b0b9455f59c33f11977d071bd56946af

Red Hat Security Advisory 2013-0267-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: tomcat7 security update
Advisory ID: RHSA-2013:0267-01
Product: JBoss Enterprise Web Server
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0267.html
Issue date: 2013-02-19
CVE Names: CVE-2012-4431
=====================================================================

1. Summary:

An update for the Apache Tomcat 7 component for JBoss Enterprise Web Server
2.0.0 that fixes one security issue is now available from the Red Hat
Customer Portal.

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Description:

Apache Tomcat is a servlet container.

It was found that sending a request without a session identifier to a
protected resource could bypass the Cross-Site Request Forgery (CSRF)
prevention filter. A remote attacker could use this flaw to perform
CSRF attacks against applications that rely on the CSRF prevention filter
and do not contain internal mitigation for CSRF. (CVE-2012-4431)

Warning: Before applying the update, back up your existing JBoss Enterprise
Web Server installation (including all applications and configuration
files).

All users of JBoss Enterprise Web Server 2.0.0 as provided from the Red Hat
Customer Portal are advised to apply this update.

3. Solution:

The References section of this erratum contains a download link (you must
log in to download the update). Before applying the update, back up your
existing JBoss Enterprise Web Server installation (including all
applications and configuration files).

Tomcat must be restarted for this update to take effect.

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

883636 - CVE-2012-4431 Tomcat/JBoss Web - Bypass of CSRF prevention filter

5. References:

https://www.redhat.com/security/data/cve/CVE-2012-4431.html
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?downloadType=securityPatches&product=webserver&version=2.0.0
http://tomcat.apache.org/security-7.html

6. Contact:

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

Copyright 2013 Red Hat, Inc.
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