USN-1637-1: Tomcat vulnerabilities

Ubuntu Security Notice USN-1637-1

21st November, 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


Several security issues were fixed in Apache Tomcat.

Software description

  • 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,

Update instructions

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:

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


CVE-2012-2733, CVE-2012-5885, CVE-2012-5886, CVE-2012-5887