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Bugtraq: Re: [ Hackerslab bug_paper ] Linux dump buffer overflow

Re: [ Hackerslab bug_paper ] Linux dump buffer overflow

From: Przemyslaw Frasunek <venglin_at_FREEBSD.LUBLIN.PL>
Date: Sat, 4 Mar 2000 00:08:35 +0100

On 02-Mar-2000 Derek Callaway wrote:
> I believe this overflow is rather difficult to exploit, (although, not
> impossible) as a result of a setuid(getuid()) before the offending code

it does setuid(), but NOT setgid(). still vulnerable.

the major problem is how to pass valid **envp to stack and let getenv()
succesfully return. probably possible by giving pointer to some valid
environment in shared libs. 

--
* Fido: 2:480/124 ** WWW: http://www.freebsd.lublin.pl ** NIC-HDL: PMF9-RIPE *
* Inet: venglin_at_freebsd.lublin.pl ** PGP: D48684904685DF43  EA93AFA13BE170BF *
Received on Mar 06 2000
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