RHSA-2013:0267 - Security Advisory

Topic

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.

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.

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.

Affected Products

• JBoss Enterprise Web Server 2 for RHEL 6 x86_64
• JBoss Enterprise Web Server Text-Only Advisories x86_64

Fixes

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

CVEs

• CVE-2012-4431

References

• 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