full-disclosure - Re: Nmap NOT VULNERABLE to Windows DLL Hijacking Vulnerability

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Date: Thu, 9 Sep 2010 09:44:36 +1000
From: paul.szabo@...ney.edu.au
To: full-disclosure@...ts.grok.org.uk, fyodor@...ecure.org
Subject: Re: Nmap NOT VULNERABLE to Windows DLL Hijacking
	Vulnerability

Fyodor <fyodor@...ecure.org> wrote:

>> nmap <= 5.21 is vulnerable to Windows DLL Hijacking Vulnerability.
>
> Nmap is not vulnerable.  DLL hijacking works because of an unfortunate
> interaction between apps which register Windows file extensions and
> the default Windows DLL search path used for those apps.  Nmap does
> not, and never has, registered any Windows file extensions.  So it
> isn't vulnerable to this issue.

The "easy demo" is with clicks, which needs registration of extensions.
The "real thing" is a DLL in the current directory. Unless you always
use "cd path/to/nmap; ./nmap" to start, you are vulnerable: most people
would set their %PATH% to include the right thing for easy nmap.

Cheers, Paul

Paul Szabo   psz@...hs.usyd.edu.au   http://www.maths.usyd.edu.au/u/psz/
School of Mathematics and Statistics   University of Sydney    Australia

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