RHSA-2012:1604 - Security Advisory

Topic

Fuse ESB Enterprise 7.1.0, which fixes two security issues, various bugs,
and adds enhancements, is now available from the Red Hat Customer Portal.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

Description

Fuse ESB Enterprise, based on Apache ServiceMix, provides an integration
platform.

This release of Fuse ESB Enterprise 7.1.0 serves as a replacement for Fuse
ESB Enterprise 7.0.2, and includes bug fixes and enhancements. Refer to the
Fuse ESB Enterprise 7.1.0 Release Notes for information on the most
significant of these changes. The Release Notes will be available shortly
from https://access.redhat.com/knowledge/docs/

The following security issues are also fixed with this release:

It was found that the Java hashCode() method implementation was susceptible
to predictable hash collisions. A remote attacker could use this flaw to
cause the Jetty HTTP server (a component of Apache Karaf, used by Fuse ESB
Enterprise) to use an excessive amount of CPU time by sending an HTTP
request with a large number of parameters whose names map to the same hash
value. This update introduces a limit of 1000 on the number of parameters
processed per request to mitigate this issue. (CVE-2011-4461)

A denial of service flaw was found in the implementation of associative
arrays (hashes) in JRuby. An attacker able to supply a large number of
inputs to a JRuby application (such as HTTP POST request parameters sent to
a web application) that are used as keys when inserting data into an array
could trigger multiple hash function collisions, making array operations
take an excessive amount of CPU time. To mitigate this issue, the Murmur
hash function has been replaced with the Perl hash function.
(CVE-2012-5370)

Note: Fuse ESB Enterprise 7.0.2 ships JRuby as part of the camel-ruby
component, which allows users to define Camel routes in Ruby. The default
use of JRuby in Fuse ESB Enterprise 7.0.2 does not appear to expose this
flaw. If the version of JRuby shipped with Fuse ESB Enterprise 7.0.2 was
used to build a custom application, then this flaw could be exposed.

Red Hat would like to thank oCERT for reporting CVE-2011-4461. oCERT
acknowledges Julian Walde and Alexander Klink as the original reporters of
CVE-2011-4461.

All users of Fuse ESB Enterprise 7.0.2 as provided from the Red Hat
Customer Portal are advised to upgrade to Fuse ESB Enterprise 7.1.0.

Solution

The References section of this erratum contains a download link (you must
log in to download the update).

Affected Products

• Red Hat Fuse 1 x86_64

Fixes

• BZ - 781677 - CVE-2011-4461 jetty: hash table collisions CPU usage DoS (oCERT-2011-003)
• BZ - 880671 - CVE-2012-5370 jruby: Murmur hash function collisions (oCERT-2012-001)

CVEs

• CVE-2012-5370
• CVE-2011-4461

References

• https://access.redhat.com/security/updates/classification/#moderate
• https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=fuse.esb.enterprise&downloadType=distributions
• https://access.redhat.com/knowledge/docs/