Re: [Full-disclosure] New Source Code Vulnerability Scanner (Free 30 Day Trial)

[Adam Kration <adamkration@xxxxxxxxx>]

Don't forget you can add a pipe to filter the pulp.

grep -fruit | grep -v pulp

-v will omit pulp, and various regexes and additives can fortify with calcium 
or vitamin C.

--- On Sat, 12/4/10, netinfinity <netinfinity.securitylab@xxxxxxxxx> wrote:

From: netinfinity <netinfinity.securitylab@xxxxxxxxx>
Subject: Re: [Full-disclosure] New Source Code Vulnerability Scanner (Free 30 
Day Trial)
To: full-disclosure@xxxxxxxxxxxxxxxxx
Date: Saturday, December 4, 2010, 11:53 AM

I was thinking about another way to possible bypass this code.

POC:

grep -fruit  

will trick the system into thinking it is a fruit thus crashing because of 
stackoverflow and juice overflow.




On Sat, Dec 4, 2010 at 12:32 PM, Georgi Guninski <guninski@xxxxxxxxxxxx> wrote:



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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Full-Disclosure - We believe in it.
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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/