The Buffer Overflow Protection (BOP) feature in McAfee VirusScan Enterprise before 8.8 Patch 6 allocates memory with Read, Write, Execute (RWX) permissions at predictable addresses on 32-bit platforms when protecting another application, which allows attackers to bypass the DEP and ASLR protection mechanisms via unspecified vectors.
https://kc.mcafee.com/corporate/index?page=content&id=SB10142
http://www.securityfocus.com/bid/78810
http://blog.ensilo.com/the-av-vulnerability-that-bypasses-mitigations