How To Defend Against Advanced IE Exploitation
Summary: Microsoft paid Yu Yang $100,000 for reporting a mitigation bypass that turns on a "god mode" in Internet Explorer through a one-byte overwrite of a flag controlling an ActiveX object's security setting, letting any script run without notification. The technique bypasses DEP, ASLR, EMET and Control Flow Integrity, and Unit 42 traced the underlying exploits to Use-After-Free bugs that alter a user-controlled address to corrupt vector or Int32Array length values and enable arbitrary memory read/write.
What's compelling: A single overwritten byte defeats every mitigation in the stack, so the defense has to move to detecting arbitrary memory access at runtime - Unit 42's WildFire module checks whether vector lengths match actual memory allocation and halts execution when they don't.
Read the original at Unit 42 Palo Alto Networks ↗
- Topics
- Malware
- Related
- ARTEX and beyond: AI-enabled penetration testing platforms Cyber Risks · Nov 13, 2026Fake GTA 6 download goes after Steam logins and crypto wallet data Cyber Risks · Nov 13, 2026Operation Endgame Takes Down Gootloader, CastleRAT and StealC Servers, Seizes 6.4M Stolen Logins Cyber Risks · Nov 13, 2026