USN-1841-1: Tomcat vulnerabilities

Ubuntu Security Notice USN-1841-1

28th May, 2013

tomcat6, tomcat7 vulnerabilities

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

  • Ubuntu 13.04
  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 10.04 LTS


Several security issues were fixed in Tomcat.

Software description

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


It was discovered that Tomcat incorrectly handled certain requests
submitted using chunked transfer encoding. A remote attacker could use this
flaw to cause the Tomcat server to stop responding, resulting in a denial
of service. This issue only affected Ubuntu 10.04 LTS and Ubuntu 12.04 LTS.

It was discovered that Tomcat incorrectly handled certain authentication
requests. A remote attacker could possibly use this flaw to inject a
request that would get executed with a victim's credentials. This issue
only affected Ubuntu 10.04 LTS, Ubuntu 12.04 LTS, and Ubuntu 12.10.

It was discovered that Tomcat sometimes exposed elements of a previous
request to the current request. This could allow a remote attacker to
possibly obtain sensitive information. This issue only affected Ubuntu
12.10 and Ubuntu 13.04. (CVE-2013-2071)

Update instructions

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

Ubuntu 13.04:
libtomcat7-java 7.0.35-1~exp2ubuntu1.1
Ubuntu 12.10:
libtomcat7-java 7.0.30-0ubuntu1.2
Ubuntu 12.04 LTS:
libtomcat6-java 6.0.35-1ubuntu3.3
Ubuntu 10.04 LTS:
libtomcat6-java 6.0.24-2ubuntu1.13

To update your system, please follow these instructions:

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


CVE-2012-3544, CVE-2013-2067, CVE-2013-2071