Moderate: mod_cluster security update
Security Advisory: Moderate
Updated mod_cluster packages that fix one security issue are now available
for JBoss Enterprise Web Platform 5.1.2 for Red Hat Enterprise Linux 4, 5,
and 6.
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.
mod_cluster is an Apache HTTP Server (httpd) based load balancer that
forwards requests from httpd to application server nodes. It can use the
AJP, HTTP, or HTTPS protocols for communication with application server
nodes.
The JBoss Enterprise Web Platform 5.1.2 release (RHSA-2011:1804,
RHSA-2011:1803, RHSA-2011:1802) introduced a regression, causing
mod_cluster to register and expose the root context of a server by default,
even when "ROOT" was in the "excludedContexts" list in the mod_cluster
configuration. If an application was deployed on the root context, a remote
attacker could use this flaw to bypass intended access restrictions and
gain access to that application. (CVE-2012-1154)
Warning: Before applying this update, back up your JBoss Enterprise Web
Platform's "server/[PROFILE]/deploy/" directory and any other customized
configuration files.
Users of JBoss Enterprise Web Platform 5.1.2 on Red Hat Enterprise Linux 4,
5, and 6 should upgrade to these updated packages, which correct this
issue. The JBoss server process must be restarted for this update to take
effect.
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258
Vulmon