full-disclosure - Re: New Source Code Vulnerability Scanner (Free 30 Day Trial)

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Date: Sat, 4 Dec 2010 13:32:46 +0200
From: Georgi Guninski <guninski@...inski.com>
To: Michal Zalewski <lcamtuf@...edump.cx>
Cc: full-disclosure@...ts.grok.org.uk, vulnscan@...hmail.com
Subject: Re: New Source Code Vulnerability Scanner (Free
 30 Day Trial)

On Fri, Dec 03, 2010 at 01:46:56AM -0800, Michal Zalewski wrote:
> > grep -r ACIDBITCHES *
> 
> This code has two very obvious detection bypass vulnerabilities:
> 
> 1) It fails to scan dotfiles in the starting directory,
> 
> 2) It can be tricked into not producing any output by creating a file
> named "-q" in the starting dir.
> 
> Let me fire up my vulnerability research whitepaper generator.
> 
> /mz
>

implementation issues aside, are the theoretic foundations of the scanner correct?

some points.

1. analyzing the grep(1) codebase. what if grep has anti-scanning backdoor - like a compiler backdoor?

2. the scanner reproducibly reports backdoors in /dev/urandom - it is
even not an .EXE!

-- 
joro

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