Issued:: 2012-01-19
Updated:: 2012-01-19

RHSA-2012:0041 - Moderate: jbossweb security update

Synopsis

Moderate: jbossweb security update

Type/Severity

Security Advisory Moderate

Topic

An update for JBoss Enterprise Application Platform 4.3.0 CP10 that fixes multiple security issues 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

JBoss Web Server is the web container, based on Apache Tomcat, in JBoss Enterprise Application Platform. It provides a single deployment platform for the JavaServer Pages (JSP) and Java Servlet technologies.

Multiple flaws were found in the way JBoss Web Server handled HTTP DIGEST authentication. These flaws weakened the JBoss Web Server HTTP DIGEST authentication implementation, subjecting it to some of the weaknesses of HTTP BASIC authentication, for example, allowing remote attackers to perform session replay attacks. (CVE-2011-1184, CVE-2011-5062, CVE-2011-5063, CVE-2011-5064)

It was found that the Java hashCode() method implementation was susceptible to predictable hash collisions. A remote attacker could use this flaw to cause JBoss Web Server 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 on the number of parameters and headers processed per request to mitigate this issue. The default limit is 512 for parameters and 128 for headers. These defaults can be changed by setting the org.apache.tomcat.util.http.Parameters.MAX_COUNT and org.apache.tomcat.util.http.MimeHeaders.MAX_COUNT system properties in "jboss-as/server/[PROFILE]/deploy/properties-service.xml". (CVE-2011-4858)

A flaw was found in the way JBoss Web Server handled sendfile request attributes when using the HTTP APR (Apache Portable Runtime) or NIO (Non-Blocking I/O) connector. A malicious web application running on a JBoss Web Server instance could use this flaw to bypass security manager restrictions and gain access to files it would otherwise be unable to access, or possibly terminate the Java Virtual Machine (JVM). (CVE-2011-2526)

Red Hat would like to thank oCERT for reporting CVE-2011-4858, and the Apache Tomcat project for reporting CVE-2011-2526. oCERT acknowledges Julian Wälde and Alexander Klink as the original reporters of CVE-2011-4858.

Warning: Before applying this update, back up your JBoss Enterprise Application Platform's "jboss-as/server/[PROFILE]/deploy/" directory, along with all other customized configuration files.

All users of JBoss Enterprise Application Platform 4.3.0 CP10 as provided from the Red Hat Customer Portal are advised to install this update.

Solution

The References section of this erratum contains a download link (you must log in to download the update). Before applying the update, back up your existing JBoss Enterprise Application Platform installation (including all applications and configuration files).

The JBoss server process must be restarted for this update to take effect.

Affected Products

Product	Version	Arch
JBoss Enterprise Application Platform	Text-Only Advisories	x86_64

Fixes

CVEs

References

Additional information

The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.