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Red Hat Security Advisory 2012-0039-01

Red Hat Security Advisory 2012-0039-01
Posted Jan 18, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0039-01 - mod_cluster-native provides a native build of mod_cluster for the Apache HTTP Server. mod_cluster is an httpd-based load balancer. Like mod_jk, it uses a communication channel to forward requests from httpd to an application server node. It was found that mod_cluster allowed worker nodes to register on any virtual host, regardless of the security constraints applied to other vhosts. In a typical environment, there will be one vhost configured internally for worker nodes, and another configured externally for serving content. A remote attacker could use this flaw to register an attacker-controlled worker node via an external vhost that is not configured to apply security constraints, then use that worker node to serve malicious content, intercept credentials, and hijack user sessions.

tags | advisory, remote, web
systems | linux, redhat
advisories | CVE-2011-4608
MD5 | 38add862fd5790fe42189e2cc4258648

Red Hat Security Advisory 2012-0039-01

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

Synopsis: Important: mod_cluster-native security update
Advisory ID: RHSA-2012:0039-01
Product: JBoss Enterprise Web Platform
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0039.html
Issue date: 2012-01-18
CVE Names: CVE-2011-4608
=====================================================================

1. Summary:

An updated mod_cluster-native package that fixes one security issue is 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
important 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. Relevant releases/architectures:

JBoss Enterprise Web Platform 5 for RHEL 4 AS - i386, x86_64
JBoss Enterprise Web Platform 5 for RHEL 4 ES - i386, x86_64
JBoss Enterprise Web Platform 5 for RHEL 5 Server - i386, x86_64
JBoss Enterprise Web Platform 5 for RHEL 6 Server - i386, x86_64

3. Description:

mod_cluster-native provides a native build of mod_cluster for the Apache
HTTP Server (httpd). mod_cluster is an httpd-based load balancer. Like
mod_jk, it uses a communication channel to forward requests from httpd to
an application server node.

It was found that mod_cluster allowed worker nodes to register on any
virtual host (vhost), regardless of the security constraints applied to
other vhosts. In a typical environment, there will be one vhost configured
internally for worker nodes, and another configured externally for serving
content. A remote attacker could use this flaw to register an
attacker-controlled worker node via an external vhost that is not
configured to apply security constraints, then use that worker node to
serve malicious content, intercept credentials, and hijack user sessions.
(CVE-2011-4608)

Users of mod_cluster-native should upgrade to this updated package, which
contains a backported patch to resolve this issue. Refer to the Solution
section for installation instructions.

4. Solution:

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/kb/docs/DOC-11259

To apply this update:

1) Install the updated mod_cluster-native package on the JBoss
Enterprise Web Platform worker node.

2) Copy the Apache HTTP Server modules provided by the updated package
to your JBoss Enterprise Web Server front-end.

3) Restart the Apache HTTP Server on your JBoss Enterprise Web Server
front-end.

Refer to the "Install proxy server components" section of the HTTP
Connectors Load Balancing Guide for JBoss Enterprise Application
Platform 5, available from docs.redhat.com, for further information
(JBoss Enterprise Web Platform is a subset of JBoss Enterprise
Application Platform).

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

767020 - CVE-2011-4608 mod_cluster: malicious worker nodes can register on any vhost

6. Package List:

JBoss Enterprise Web Platform 5 for RHEL 4 AS:

Source:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.src.rpm

i386:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.i386.rpm
mod_cluster-native-debuginfo-1.0.10-4.GA_CP02.ep5.el4.i386.rpm

x86_64:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.x86_64.rpm
mod_cluster-native-debuginfo-1.0.10-4.GA_CP02.ep5.el4.x86_64.rpm

JBoss Enterprise Web Platform 5 for RHEL 4 ES:

Source:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.src.rpm

i386:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.i386.rpm
mod_cluster-native-debuginfo-1.0.10-4.GA_CP02.ep5.el4.i386.rpm

x86_64:
mod_cluster-native-1.0.10-4.GA_CP02.ep5.el4.x86_64.rpm
mod_cluster-native-debuginfo-1.0.10-4.GA_CP02.ep5.el4.x86_64.rpm

JBoss Enterprise Web Platform 5 for RHEL 5 Server:

Source:
mod_cluster-native-1.0.10-4.1.GA_CP02.ep5.el5.src.rpm

i386:
mod_cluster-native-1.0.10-4.1.GA_CP02.ep5.el5.i386.rpm
mod_cluster-native-debuginfo-1.0.10-4.1.GA_CP02.ep5.el5.i386.rpm

x86_64:
mod_cluster-native-1.0.10-4.1.GA_CP02.ep5.el5.x86_64.rpm
mod_cluster-native-debuginfo-1.0.10-4.1.GA_CP02.ep5.el5.x86_64.rpm

JBoss Enterprise Web Platform 5 for RHEL 6 Server:

Source:
mod_cluster-native-1.0.10-4.1.1.GA_CP02.ep5.el6.src.rpm

i386:
mod_cluster-native-1.0.10-4.1.1.GA_CP02.ep5.el6.i386.rpm
mod_cluster-native-debuginfo-1.0.10-4.1.1.GA_CP02.ep5.el6.i386.rpm

x86_64:
mod_cluster-native-1.0.10-4.1.1.GA_CP02.ep5.el6.x86_64.rpm
mod_cluster-native-debuginfo-1.0.10-4.1.1.GA_CP02.ep5.el6.x86_64.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-4608.html
https://access.redhat.com/security/updates/classification/#important
http://docs.redhat.com/docs/en-US/index.html

8. Contact:

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

Copyright 2012 Red Hat, Inc.
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