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problem in off by one overflow

From: Breno Pinto (brenosecforum.com.br)
Date: Sat Feb 05 2005 - 09:20:34 CST

Hi,

I have problem to exploit an off by one vulnerability. When i overwrite ebp with some data and i´t point to my NOPS, i receive an SIGSEGV message.

SIGSEGV message in 0x90909090 ??

I´m using red hat 7.3 and gcc 2.95.

Anybody knows why 0x90909090 broke my exploitation ?

Thanks

Breno