Unspecified vulnerability in Microsoft Windows 7 allows attackers to bypass the ASLR and DEP protection mechanisms via unknown vectors, as demonstrated against Firefox by VUPEN during a Pwn2Own competition at CanSecWest 2013, a different vulnerability than CVE-2013-0787.
http://twitter.com/thezdi/statuses/309484730506698752
http://h30499.www3.hp.com/t5/HP-Security-Research-Blog/Pwn2Own-2013/ba-p/5981157