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Ubuntu: Security update for Apache Tomcat

It was discovered that the Apache Tomcat HTTP NIO connector incorrectly handled header data. A remote attacker could cause a denial of service by sending requests with a large amount of header data. It was discovered that Apache Tomcat incorrectly handled DIGEST authentication. A remote attacker could possibly use these flaws to perform a replay attack and bypass authentication.

Updated packages are available from security.ubuntu.com.

==========================================================================
Ubuntu Security Notice USN-1637-1
November 21, 2012

tomcat6 vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS

Summary:

Several security issues were fixed in Apache Tomcat.

Software Description:
- tomcat6: Servlet and JSP engine

Details:

It was discovered that the Apache Tomcat HTTP NIO connector incorrectly
handled header data. A remote attacker could cause a denial of service by
sending requests with a large amount of header data. (CVE-2012-2733)

It was discovered that Apache Tomcat incorrectly handled DIGEST
authentication. A remote attacker could possibly use these flaws to perform
a replay attack and bypass authentication. (CVE-2012-5885, CVE-2012-5886,
CVE-2012-5887)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
 libtomcat6-java                 6.0.35-1ubuntu3.1

Ubuntu 11.10:
 libtomcat6-java                 6.0.32-5ubuntu1.3

Ubuntu 10.04 LTS:
 libtomcat6-java                 6.0.24-2ubuntu1.11

In general, a standard system update will make all the necessary changes.

References:
 http://www.ubuntu.com/usn/usn-1637-1
 CVE-2012-2733, CVE-2012-3439, CVE-2012-5885, CVE-2012-5886,
 CVE-2012-5887

Package Information:
 https://launchpad.net/ubuntu/+source/tomcat6/6.0.35-1ubuntu3.1
 https://launchpad.net/ubuntu/+source/tomcat6/6.0.32-5ubuntu1.3
 https://launchpad.net/ubuntu/+source/tomcat6/6.0.24-2ubuntu1.11
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