USN-1359-1: Tomcat vulnerabilities

Ubuntu Security Notice USN-1359-1

13th February, 2012

tomcat6 vulnerabilities

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

  • Ubuntu 11.10
  • Ubuntu 11.04
  • Ubuntu 10.10
  • Ubuntu 10.04 LTS


Tomcat could be made to crash or expose sensitive information if it received specially crafted network traffic.

Software description

  • tomcat6 - Servlet and JSP engine


It was discovered that Tomcat incorrectly performed certain caching and
recycling operations. A remote attacker could use this flaw to obtain read
access to IP address and HTTP header information in certain cases. This
issue only applied to Ubuntu 11.10. (CVE-2011-3375)

It was discovered that Tomcat computed hash values for form parameters
without restricting the ability to trigger hash collisions predictably.
A remote attacker could cause a denial of service by sending many crafted
parameters. (CVE-2011-4858)

It was discovered that Tomcat incorrectly handled parameters. A remote
attacker could cause a denial of service by sending requests with a large
number of parameters and values. (CVE-2012-0022)

Update instructions

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

Ubuntu 11.10:
libtomcat6-java 6.0.32-5ubuntu1.2
Ubuntu 11.04:
libtomcat6-java 6.0.28-10ubuntu2.3
Ubuntu 10.10:
libtomcat6-java 6.0.28-2ubuntu1.6
Ubuntu 10.04 LTS:
libtomcat6-java 6.0.24-2ubuntu1.10

To update your system, please follow these instructions:

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


CVE-2011-3375, CVE-2011-4858, CVE-2012-0022