Ubuntu Security Notice USN-1637-1
21st November, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
Several security issues were fixed in Apache Tomcat.
- tomcat6 - Servlet and JSP engine
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,
The problem can be corrected by updating your system to the following package version:
- 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
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.