Adobe Reader and Acrobat 7.x before 7.1.4, 8.x before 8.1.7, and 9.x before 9.2 on Unix, when Debug mode is enabled, allow attackers to execute arbitrary code via unspecified vectors, related to a "format bug."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6429
http://www.vupen.com/english/advisories/2009/2898
http://www.us-cert.gov/cas/techalerts/TA09-286B.html
http://www.securityfocus.com/bid/36638
http://www.adobe.com/support/security/bulletins/apsb09-15.html