Debian Security Advisory

DLA-623-1 tomcat7 -- LTS security update

Date Reported:
15 Sep 2016
Affected Packages:
tomcat7
Vulnerable:
Yes
Security database references:
In Mitre's CVE dictionary: CVE-2016-1240.
More information:

Dawid Golunski from legalhackers.com discovered that Debian's version of Tomcat 7 was vulnerable to a local privilege escalation. Local attackers who have gained access to the server in the context of the tomcat7 user through a vulnerability in a web application were able to replace the file with a symlink to an arbitrary file.

The full advisory can be found at

http://legalhackers.com/advisories/Tomcat-Debian-based-Root-Privilege-Escalation-Exploit.txt

In addition this security update also fixes Debian bug #821391. File ownership in /etc/tomcat7 will no longer be unconditionally overridden on upgrade. As another precaution the file permissions of Debian specific configuration files in /etc/tomcat7 were changed to 640 to disallow world readable access.

For Debian 7 Wheezy, these problems have been fixed in version 7.0.28-4+deb7u6.

We recommend that you upgrade your tomcat7 packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS