full-disclosure - Re: QFTP (LIBFtp 3.1-1) (command line) sprintf() local buffer overflow

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Message-Id: <200703160136.l2G1aCQ5015461@turing-police.cc.vt.edu>
Date: Thu, 15 Mar 2007 21:36:12 -0400
From: Valdis.Kletnieks@...edu
To: Knud Erik Højgaard <kokanin@...il.com>
Cc: listgrok <full-disclosure@...ts.grok.org.uk>
Subject: Re: QFTP (LIBFtp 3.1-1) (command line) sprintf()
	local buffer overflow

On Thu, 15 Mar 2007 21:12:50 BST, =?ISO-8859-1?Q?Knud_Erik_H=F8jgaard?= said:
> On 3/15/07, starcadi starcadi <starcadi@...il.com> wrote:
> 
> > >> POC
> yes, piece of crap. Who cares about local overflows in non-suid applications?

It can be interesting if you can find a way to get some *other* user to
run the application - so if you can find a web server that has a CGI that
invokes QFTP (or whatever) with attacker-controlled parameters, you can use
that to pwn the webserver.  Basically, you need to be able to leverage the
distinction between "yourself" and "the userid executing the program".

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