Full Disclosure mailing list archives
RE: What is the crap before SEH?
From: <fd () ben iagu net>
Date: Thu, 30 Mar 2006 16:42:49 +0700
Here's a picture I drew a while ago, showing the post-overflow phase of the SEH bounce attack - it might help. If you mess with the short jump, you'll try and execute the SEH pointer as code, which is why it will barf. Cheers, ben
-----Original Message----- From: full-disclosure-bounces () lists grok org uk [mailto:full-disclosure-bounces () lists grok org uk] On Behalf Of Tauqeer Ahmad Sent: Thursday, March 30, 2006 2:36 PM To: full-disclosure () lists grok org uk Subject: [Full-disclosure] What is the crap before SEH? Hello list, while disecting the Bluecoat winproxy long header vulnerability and the HD Moor exploit for that, i found in the stack dump a pointer just before SEH. this pointer is said to be the "the pointer ot next SEH structure". But when i change the single byte of that pointer the exploit didnt work, Although in my knowlege it should have worked since it's SEH which points to POP POP RET and the control transfers to our shellcode lying after SEH. I will appreciate a reply clearing the fact that where that pointer before SEH points to? is that pointer overwritten with the same address that was there before the overflow? It will sound navie for those who already know this concept yet i will appreciate a help from those guys by clearifying. I also know some guys will come up with the flame as its the Hacking culture to flame others who knows less then them. but i can remember the day when i used to wonder how they break into the system and i often got flamed for asking a question. yet i have come along this far by not heeding an ear to their flame and by keeping learning. so a flame will not work ofcourse :P Thanks in advance,
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Current thread:
- What is the crap before SEH? Tauqeer Ahmad (Mar 29)
- RE: What is the crap before SEH? fd (Mar 30)