Issued:

2013-02-19

Updated:

2013-02-19

RHSA-2013:0265 - Moderate: tomcat6 security update

Synopsis

Moderate: tomcat6 security update

Type/Severity

Security Advisory Moderate

Topic

An update for the Apache Tomcat 6 component for JBoss Enterprise Web Server 2.0.0 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

Apache Tomcat is a servlet container.

It was found that sending a request without a session identifier to a protected resource could bypass the Cross-Site Request Forgery (CSRF) prevention filter. A remote attacker could use this flaw to perform CSRF attacks against applications that rely on the CSRF prevention filter and do not contain internal mitigation for CSRF. (CVE-2012-4431)

A flaw was found in the way Tomcat handled sendfile operations when using the HTTP NIO (Non-Blocking I/O) connector and HTTPS. A remote attacker could use this flaw to cause a denial of service (infinite loop). The HTTP NIO connector is used by default in JBoss Enterprise Web Server. The Apache Portable Runtime (APR) connector from the Tomcat Native library was not affected by this flaw. (CVE-2012-4534)

Multiple weaknesses were found in the Tomcat DIGEST authentication implementation, effectively reducing the security normally provided by DIGEST authentication. A remote attacker could use these flaws to perform replay attacks in some circumstances. (CVE-2012-5885, CVE-2012-5886, CVE-2012-5887)

A denial of service flaw was found in the way the Tomcat HTTP NIO connector enforced limits on the permitted size of request headers. A remote attacker could use this flaw to trigger an OutOfMemoryError by sending a specially-crafted request with very large headers. The HTTP NIO connector is used by default in JBoss Enterprise Web Server. The APR connector from the Tomcat Native library was not affected by this flaw. (CVE-2012-2733)

Warning: Before applying the update, back up your existing JBoss Enterprise Web Server installation (including all applications and configuration files).

All users of JBoss Enterprise Web Server 2.0.0 as provided from the Red Hat Customer Portal are advised to apply 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 Web Server installation (including all applications and configuration files).

Tomcat must be restarted for this update to take effect.

Affected Products

Fixes

• This content is not included.BZ - 873664
• This content is not included.BZ - 873695
• This content is not included.BZ - 883636
• This content is not included.BZ - 883637

CVEs

• CVE-2012-2733
• CVE-2012-4431
• CVE-2012-4534
• CVE-2012-5885
• CVE-2012-5886
• CVE-2012-5887

References

• https://access.redhat.com/security/updates/classification/#moderate
• This content is not included.This content is not included.https://access.redhat.com/jbossnetwork/restricted/listSoftware.html?downloadType=securityPatches&product=webserver&version=2.0.0
• Content from tomcat.apache.org is not included.Content from tomcat.apache.org is not included.http://tomcat.apache.org/security-6.html

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.