3COM TFTPD Overflow: SEH Overwrite
[email protected] 25 Jan 2008 14:58:43 -0000
| Newsgroups | gmane.comp.security.vulnerabilities |
|---|---|
| Message-ID | <[email protected]> |
I'm attempting to exploit an already known bug in 3COM TFTPD server, and = execute "calc.exe" with my shellcode. I have control of ECX/EIP, and can= overwrite both SEH and pointer to next SEH successfully, and have used:=0D =0D Pointer to next SEH: \xeb\x10\x90\x90=0D SEH: \x69\x12\xab\x71 (POP/POP/RET in ws2_32.dll)=0D =0D A full writeup with screenshots is available at:=0D http://filebin.ca/pmuwqm/SEHOverwrite.rtf=0D =0D I'm getting "Debugged program was unable to process exception", so I hit = shift+f9 (in olly) and it terminates with some strange exit code. Could = you take a peek and see what I'm missing here?=0D =0D Thanks guys!=0D =0D -jj