Absolute path traversal vulnerability in the org.debian.apt.UpdateCachePartially method in worker.py in Aptdaemon 0.40 in Ubuntu 10.10 and 11.04 allows local users to read arbitrary files via a full pathname in the sources_list argument, related to the D-Bus interface.
https://exchange.xforce.ibmcloud.com/vulnerabilities/65652
https://bugs.launchpad.net/bugs/722228
http://www.vupen.com/english/advisories/2011/0459
http://www.ubuntu.com/usn/USN-1068-1