USN-1685-1: Tomcat vulnerabilities

Ubuntu Security Notice USN-1685-1

14th January, 2013

tomcat6, tomcat7 vulnerabilities

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • Ubuntu 10.04 LTS

Summary

Several security issues were fixed in Tomcat.

Software description

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

Details

It was discovered that Tomcat incorrectly performed certain security
constraint checks in the FORM authenticator. A remote attacker could
possibly use this flaw with a specially-crafted URI to bypass security
constraint checks. This issue only affected Ubuntu 10.04 LTS, Ubuntu 11.10
and Ubuntu 12.04 LTS. (CVE-2012-3546)

It was discovered that Tomcat incorrectly handled requests that lack a
session identifier. A remote attacker could possibly use this flaw to
bypass the cross-site request forgery protection. (CVE-2012-4431)

It was discovered that Tomcat incorrectly handled sendfile and HTTPS when
the NIO connector is used. A remote attacker could use this flaw to cause
Tomcat to stop responsing, resulting in a denial of service. This issue
only affected Ubuntu 10.04 LTS, Ubuntu 11.10 and Ubuntu 12.04 LTS.
(CVE-2012-4534)

Update instructions

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

Ubuntu 12.10:
libtomcat7-java 7.0.30-0ubuntu1.1
Ubuntu 12.04 LTS:
libtomcat6-java 6.0.35-1ubuntu3.2
Ubuntu 11.10:
libtomcat6-java 6.0.32-5ubuntu1.4
Ubuntu 10.04 LTS:
libtomcat6-java 6.0.24-2ubuntu1.12

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.

References

CVE-2012-3546, CVE-2012-4431, CVE-2012-4534