Researcher Reveals How Logic Bugs Alone Cracked Microsoft Edge in $175,000 Pwn2Own Win
Summary
A security researcher has demonstrated a chain of logic flaws in Microsoft Edge that allowed arbitrary code execution outside the browser's sandbox, without relying on memory corruption. The researcher revealed the full method, which won $175,000 at Pwn2Own Berlin, five months after the contest, with Microsoft patching the vulnerabilities the following day.
IFF Assessment
The discovery and public disclosure of a sophisticated exploit chain that bypasses sandbox protections represents a significant win for attackers and a challenge for defenders.
Severity
This vulnerability is estimated to have a high CVSS score due to its potential for complete system compromise through a chain of logic flaws without requiring memory corruption, allowing for code execution outside the browser sandbox.
Defender Context
This highlights the persistent threat of logic bugs, which can be more difficult to detect and patch than memory corruption vulnerabilities. Defenders should remain vigilant for such complex exploit chains and prioritize timely patching of browser software.