Joel Eriksson & Panel: Kernel Wars


Manage episode 152211986 series 1053194
Player FM과 저희 커뮤니티의 Black Hat Briefings, USA 2007 [Video] Presentations from the security conference. 콘텐츠는 모두 원 저작자에게 속하며 Player FM이 아닌 작가가 저작권을 갖습니다. 오디오는 해당 서버에서 직접 스트리밍 됩니다. 구독 버튼을 눌러 Player FM에서 업데이트 현황을 확인하세요. 혹은 다른 팟캐스트 앱에서 URL을 불러오세요.
Kernel vulnerabilities are often deemed unexploitable or at least unlikely to be exploited reliably. Although it's true that kernel-mode exploitation often presents some new challenges for exploit developers, it still all boils down to ""creative debugging"" and knowledge about the target in question.
This talk intends to demystify kernel-mode exploitation by demonstrating the analysis and reliable exploitation of three different kernel vulnerabilities without public exploits. From a defenders point of view this could hopefully serve as an eye-opener, as it demonstrates the ineffectiveness of HIDS, NX, ASLR and other protective measures when the kernel itself is being exploited.
The entire process will be discussed, including how the vulnerabilities were found, how they were analyzed to determine if and how they can be reliably exploited and of course the exploits will be demonstrated in practice.
The vulnerabilities that will be discussed are:
- FreeBSD 802.11 Management Frame Integer Overflow
Found and exploited by Karl Janmar.
- NetBSD Local Kernel Heap Overflow
Found by Christer ?berg, exploited by Christer ?berg and Joel Eriksson.
- Windows (2000 & XP) Local GDI Memory Overwrite
Found by Cesar Cerrudo, exploited by Joel Eriksson.
More information about the vulnerabilities can be found at:

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