full-disclosure - Re: Buffer Overflow in dnsmap 0.22 - DNS Network Mapper by pagvac (gnucitizen.org)

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Date: Wed, 25 Feb 2009 11:10:57 -0500
From: Jason Starks <jstarks440@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Re: Buffer Overflow in dnsmap 0.22 - DNS Network
	Mapper by pagvac (gnucitizen.org)

I'm going to say dnsmap isn't suid or sguid, and a segmentation fault can
occur after triggering a simple programming error (you've shown no signs of
code execution). Terrrrrrrific.

On Wed, Feb 25, 2009 at 10:36 AM, srl <security.research.labs@...il.com>wrote:

> Security Advisory:
>
> PRODUCT
> ************
> http://www.gnucitizen.org/blog/new-version-of-dnsmap-out/
> http://www.gnucitizen.org/static/blog/2009/02/dnsmap-022.tar
>
> This this is a great tool, used by the two pentesters, pagvac and pdp
>
> TECHNICAL DESCRIPTION
> ********************************
> A local buffer overflow exist in dnsmap 0.22.
> $ dnsmap -r `perl -e 'print "A"x250'`
> dnsmap 0.22 - DNS Network Mapper by pagvac (gnucitizen.org)
>
> Segmentation fault
>
> SOLUTION
> *************
> Wait until pagvac will learn about strncpy().
>
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> _______________________________________________
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