xloadimage before 4.1-r2, and xli before 1.17, allows attackers to execute arbitrary commands via shell metacharacters in filenames for compressed images, which are not properly quoted when calling the gunzip command.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10898
http://www.securityfocus.com/bid/12712
http://www.securityfocus.com/archive/1/433935/30/5010/threaded
http://www.redhat.com/support/errata/RHSA-2005-332.html
http://www.debian.org/security/2005/dsa-695
http://support.avaya.com/elmodocs2/security/ASA-2005-134_RHSA-2005-332.pdf
http://security.gentoo.org/glsa/glsa-200503-05.xml
http://secunia.com/advisories/14462