(RHSA-2011:0945) Important: JBoss Enterprise Web Platform 5.1.1 update

The Enterprise Web Platform is for mid-size workloads, focusing on light
and rich Java applications. Web Platform is a slimmed down profile of the
JBoss Enterprise Application Platform.

This JBoss Enterprise Web Platform 5.1.1 release for Red Hat Enterprise
Linux 4, 5, and 6 serves as a replacement for JBoss Enterprise Web Platform
5.1.0.

These updated packages include the bug fixes detailed in the release notes,
which are linked to from the References section of this erratum.

The following security issue is also fixed with this release:

It was found that the fix for CVE-2011-1484 was incomplete: JBoss Seam 2
did not block access to all malicious JBoss Expression Language (EL)
constructs in page exception handling, allowing arbitrary Java methods to
be executed. A remote attacker could use this flaw to execute arbitrary
code via a specially-crafted URL provided to certain applications based on
the JBoss Seam 2 framework. Note: A properly configured and enabled Java
Security Manager would prevent exploitation of this flaw. (CVE-2011-2196)

Red Hat would like to thank the ObjectWorks+ Development Team at Nomura
Research Institute for reporting this issue.

Warning: Before applying this update, please back up your JBoss Enterprise
Web Platform’s “jboss-as-web/server/[PROFILE]/deploy/” directory and any
other customized configuration files.

All users of JBoss Enterprise Web Platform on Red Hat Enterprise Linux 4,
5, and 6 are advised to upgrade to these updated packages. Manual action is
required for this update to take effect. Refer to the Solution section for
details.