gdb before 6.3 searches the current working directory to load the .gdbinit configuration file, which allows local users to execute arbitrary commands as the user running gdb.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11072
http://www.redhat.com/support/errata/RHSA-2005-801.html
http://www.redhat.com/support/errata/RHSA-2005-709.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:095
http://support.avaya.com/elmodocs2/security/ASA-2006-015.htm
http://security.gentoo.org/glsa/glsa-200505-15.xml
http://secunia.com/advisories/18506
http://secunia.com/advisories/17356