(RHSA-2013:0561) Moderate: Red Hat Enterprise MRG Messaging 2.3 security update

Red Hat Enterprise MRG (Messaging, Realtime, and Grid) is a next-generation
IT infrastructure for enterprise computing. MRG offers increased
performance, reliability, interoperability, and faster computing for
enterprise customers.

MRG Messaging is a high-speed reliable messaging distribution for Linux
based on AMQP (Advanced Message Queuing Protocol), an open protocol
standard for enterprise messaging that is designed to make mission critical
messaging widely available as a standard service, and to make enterprise
messaging interoperable across platforms, programming languages, and
vendors. MRG Messaging includes an AMQP 0-10 messaging broker; AMQP 0-10
client libraries for C++, Java JMS, and Python; as well as persistence
libraries and management tools.

It was found that the Apache Qpid daemon (qpidd) treated AMQP connections
with the federation_tag attribute set as a broker-to-broker connection,
rather than a client-to-server connection. This resulted in the source user
ID of messages not being checked. A client that can establish an AMQP
connection with the broker could use this flaw to bypass intended
authentication. For Condor users, if condor-aviary is installed, this flaw
could be used to submit jobs that would run as any user (except root, as
Condor does not run jobs as root). (CVE-2012-4446)

It was found that the AMQP type decoder in qpidd allowed arbitrary data
types in certain messages. A remote attacker could use this flaw to send a
message containing an excessively large amount of data, causing qpidd to
allocate a large amount of memory. qpidd would then be killed by the Out of
Memory killer (denial of service). (CVE-2012-4458)

An integer overflow flaw, leading to an out-of-bounds read, was found in
the Qpid qpid::framing::Buffer::checkAvailable() function. An
unauthenticated, remote attacker could send a specially-crafted message to
Qpid, causing it to crash. (CVE-2012-4459)

The CVE-2012-4446, CVE-2012-4458, and CVE-2012-4459 issues were discovered
by Florian Weimer of the Red Hat Product Security Team.

This update also fixes several bugs and adds enhancements. Documentation
for these changes will be available shortly from the Technical Notes
document linked to in the References section.

All users of the Messaging capabilities of Red Hat Enterprise MRG are
advised to upgrade to these updated packages, which resolve these issues,
and fix the bugs and add the enhancements noted in the Red Hat Enterprise
MRG 2 Technical Notes. After installing the updated packages, stop the
cluster by either running “service qpidd stop” on all nodes, or
“qpid-cluster --all-stop” on any one of the cluster nodes. Once stopped,
restart the cluster with “service qpidd start” on all nodes for the update
to take effect.