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Windows Kernel Intel x64 SYSRET Vulnerability + Code Signing Bypass Bonus
From: Shahriyar Jalayeri <shahriyar.j () gmail com>
Date: Sun, 26 Aug 2012 00:22:20 +0430
Hi Microsoft Windows Kernel Intel x64 SYSRET Vulnerability (MS12-042) was only exploited by VUPEN, apparently!, But no PoC or exploit publicly available. So I decided to work on this challenge just for fun.At first glance, it was difficult to get Code-Execution but after several times struggling with Windbg I finally succeeded on triggering the bug and get code-execution.By the way, Windbg had stupid bug on executing SWAPGS by single-stepping! I don’t really know why, but the guest VM always reboots! I managed to get it to work with IDA Pro + GDB remote Debugging plugin after all! here is the rest of story + PoC ( http://repret.wordpress.com/2012/08/25/windows-kernel-intel-x64-sysret-vulnerability-code-signing-bypass-bonus/ ) - Shahriyar Jalayeri twitter.com/ponez _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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- Windows Kernel Intel x64 SYSRET Vulnerability + Code Signing Bypass Bonus Shahriyar Jalayeri (Aug 26)