cvsbug in CVS 1.12.12 and earlier creates temporary files insecurely, which allows local users to overwrite arbitrary files and execute arbitrary code via a symlink attack.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10835
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=166366
http://www.vupen.com/english/advisories/2005/1667
http://www.redhat.com/support/errata/RHSA-2005-756.html
http://www.debian.org/security/2005/dsa-806
http://www.debian.org/security/2005/dsa-802