Full Disclosure mailing list archives
Re: Internet Exploiter 2 - bypassing DEP
From: Berend-Jan Wever <berendjanwever () gmail com>
Date: Tue, 2 Mar 2010 01:40:32 +0100
It seems my English is not as good as I thought and I accidentally led Ryan Naraine <http://blogs.zdnet.com/security/?p=5573>, Larry Seltzer<http://skypher.com/index.php/2010/03/01/internet-exploiter-2-dep/#comments> and probably others to come to conclusions such as that I released a weaponized 0-day that bypasses both ASLR+DEP in current versions of MSIE and Windows using a completely new technique and that I did so as a Google employee. However, let me try to explain better and to correct any ambiguity I may have created in my first blog post: - I have recently released an exploit that I developed in 2005 (before I was employed by either MS or Google). - I am releasing this as an individual as part of my new-years resolution<http://skypher.com/index.php/2010/01/02/new-years-resolutions/> to dump random stuff from my harddisk onto the tubes. (I have a personal interest in security outside of my work, every now and then I find enough time to work on and release stuff like this). - The exploit targets a bug that was fixed in 2005<http://skypher.com/wiki/index.php?title=Www.edup.tudelft.nl/~bjwever/advisory_msie_R6025.html.php>, that only affected MSIE 6.0 and earlier. - The exploit shows how to implement the well known ret-into-libc technique (using a heap spray) to bypass DEP. - The exploit does not contain anything that is not already public, other than how to implement a ret-into-libc using a heap-spray to exploit complex memory corruption bugs such as the DHTML race condition it targets. - The exploit does not bypass ASLR. - Using ret-into-libc to bypass DEP affects any application that has a vulnerability that allows an attacker to use a ret-into-libc attack - this is not MSIE specific. I hope this helps clarify some things. But, not being a native English speaker, I may inadvertently have said things completely wrong again. I look forward to correcting my mistakes as they show up on other news sites in the future. Cheers, SkyLined Berend-Jan Wever <berendjanwever () gmail com> http://skypher.com/SkyLined On Mon, Mar 1, 2010 at 4:51 PM, Berend-Jan Wever <berendjanwever () gmail com>wrote:
Hey all, I released a version of my Internet Exploiter 2 exploit from 2005 that bypasses DEP. If you are familiar with my Internet Exploiter series of exploits and/or are interested in how to use heap-spraying to bypass DEP, you may like this: http://skypher.com/index.php/2010/03/01/internet-exploiter-2-dep/ Cheers, SkyLined <http://skypher.com/index.php/2010/03/01/internet-exploiter-2-dep/> Berend-Jan Wever <berendjanwever () gmail com> http://skypher.com/SkyLined
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Current thread:
- Internet Exploiter 2 - bypassing DEP Berend-Jan Wever (Mar 01)
- Re: Internet Exploiter 2 - bypassing DEP Berend-Jan Wever (Mar 01)
- Re: Internet Exploiter 2 - bypassing DEP Larry Seltzer (Mar 01)
- Re: Internet Exploiter 2 - bypassing DEP Berend-Jan Wever (Mar 01)