linki.py in ekg 2005-06-05 and earlier allows local users to overwrite or create arbitrary files via a symlink attack on temporary files.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2005-1918
http://www.zataz.net/adviso/ekg-06062005.txt
http://www.debian.org/security/2005/dsa-760