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.