Several security issues were fixed in Tomcat.
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)
14 January 2013
A security issue affects these releases of Ubuntu and its derivatives:
Several security issues were fixed in Tomcat.
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)
The problem can be corrected by updating your system to the following package versions:
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.
Vulmon