Issued:

2014-07-09

Updated:

2014-07-09

RHSA-2014:0865 - Moderate: tomcat6 security and bug fix update

Synopsis

Moderate: tomcat6 security and bug fix update

Type/Severity

Security Advisory Moderate

Topic

Updated tomcat6 packages that fix three security issues and two bugs are now available for Red Hat Enterprise Linux 6.

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 for the Java Servlet and JavaServer Pages (JSP) technologies.

It was discovered that Apache Tomcat did not limit the length of chunk sizes when using chunked transfer encoding. A remote attacker could use this flaw to perform a denial of service attack against Tomcat by streaming an unlimited quantity of data, leading to excessive consumption of server resources. (CVE-2014-0075)

It was found that Apache Tomcat did not check for overflowing values when parsing request content length headers. A remote attacker could use this flaw to perform an HTTP request smuggling attack on a Tomcat server located behind a reverse proxy that processed the content length header correctly. (CVE-2014-0099)

It was found that the org.apache.catalina.servlets.DefaultServlet implementation in Apache Tomcat allowed the definition of XML External Entities (XXEs) in provided XSLTs. A malicious application could use this to circumvent intended security restrictions to disclose sensitive information. (CVE-2014-0096)

The CVE-2014-0075 issue was discovered by David Jorm of Red Hat Product Security.

This update also fixes the following bugs:

• The patch that resolved the CVE-2014-0050 issue contained redundant code. This update removes the redundant code. (BZ#1094528)

• The patch that resolved the CVE-2013-4322 issue contained an invalid check that triggered a java.io.EOFException while reading trailer headers for chunked requests. This update fixes the check and the aforementioned exception is no longer triggered in the described scenario. (BZ#1095602)

All Tomcat 6 users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. Tomcat must be restarted for this update to take effect.

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/articles/11258

Affected Products

Updated Packages

• tomcat6-docs-webapp-6.0.24-72.el6_5.noarch.rpm
• tomcat6-el-2.1-api-6.0.24-72.el6_5.noarch.rpm
• tomcat6-6.0.24-72.el6_5.noarch.rpm
• tomcat6-javadoc-6.0.24-72.el6_5.noarch.rpm
• tomcat6-lib-6.0.24-72.el6_5.noarch.rpm
• tomcat6-admin-webapps-6.0.24-72.el6_5.noarch.rpm
• tomcat6-jsp-2.1-api-6.0.24-72.el6_5.noarch.rpm
• tomcat6-webapps-6.0.24-72.el6_5.noarch.rpm
• tomcat6-servlet-2.5-api-6.0.24-72.el6_5.noarch.rpm
• tomcat6-6.0.24-72.el6_5.src.rpm

Fixes

• This content is not included.BZ - 1072776
• This content is not included.BZ - 1088342
• This content is not included.BZ - 1095602
• This content is not included.BZ - 1102030

CVEs

• CVE-2014-0075
• CVE-2014-0096
• CVE-2014-0099

References

• https://access.redhat.com/security/updates/classification/#moderate
• Content from tomcat.apache.org is not included.Content from tomcat.apache.org is not included.https://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.