USN-3204-1: Tomcat vulnerability

20 February 2017

tomcat6, tomcat7 vulnerability

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

  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Tomcat could be made to consume resources if it received specially crafted network traffic.

Software Description

  • tomcat7 - Servlet and JSP engine
  • tomcat6 - Servlet and JSP engine


It was discovered that Tomcat incorrectly handled certain HTTP requests. A remote attacker could possibly use this issue to cause Tomcat to consume resources, resulting in a denial of service.

Update instructions

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

Ubuntu 14.04 LTS
libtomcat7-java - 7.0.52-1ubuntu0.10
tomcat7 - 7.0.52-1ubuntu0.10
Ubuntu 12.04 LTS
libtomcat6-java - 6.0.35-1ubuntu3.11
tomcat6 - 6.0.35-1ubuntu3.11

To update your system, please follow these instructions:

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