Untrusted search path vulnerability in apt-listchanges.py in apt-listchanges before 2.82 allows local users to execute arbitrary code via a malicious apt-listchanges program in the current working directory.
http://www.ubuntu.com/usn/usn-572-1
http://www.securityfocus.com/bid/27331
http://www.debian.org/security/2008/dsa-1465
http://secunia.com/advisories/28574
http://secunia.com/advisories/28513
http://packages.debian.org/changelogs/pool/main/a/apt-listchanges/apt-listchanges_2.82/changelog