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Re: Format String Vulnerability in Valve's CS-Source

daemon@ATHENA.MIT.EDU (Luigi Auriemma)
Fri Oct 15 15:27:39 2004

Date: Thu, 14 Oct 2004 19:28:36 +0000
From: Luigi Auriemma <aluigi@autistici.org>
To: bugtraq@securityfocus.com, mc.iglo@ddclan.de
Message-Id: <20041014192836.47e3964d.aluigi@autistici.org>
In-Reply-To: <20041014190717.0fccd552.aluigi@autistici.org>
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> if u type '%n' (without ') to in-game-console, your game crashes
> instantly.
> 
> So far, i was not able, to do this remotely with rcon %n e.g., but this
> does not mean, it is not possible.

If this is the same bug I reported over one year ago
http://aluigi.altervista.org/adv/hlclientfs-adv.txt probably Valve has not
patched it yet or something similar (I don't play with Half-Life from
years).

About exploitation, the only method I found was versus the connected clients
using the "Unknown command" reply sent by the server directly to them.


BYEZ


--- 
Luigi Auriemma
http://aluigi.altervista.org


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