bugtraq - Windows NT Message Compiler 1.00.5239 arbitrary code execution

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Message-ID: <836545866459aad368f1251.61892808.Active.mail@poczta.nazwa.pl>
Date: Tue,  2 Jan 2007 20:06:30 +0100
From: sapheal@...k.pl
To: bugtraq@...urityfocus.com
Subject: Windows NT Message Compiler 1.00.5239 arbitrary code execution

Synopsis: Windows NT Message Compiler 1.00.5239 arbitrary code execution
Product:   Microsoft Windows XP

Issue:
======

A critical security vulnerability has been found in Windows NT Message Compiler.
Arbitrary code execution might be possible (local exploitation possible only).

Details:
========
MC (Windows NT Message Compiler) when provided a MC-filename longer than
requested crashed due to memory corruption. Memory corruption conditions
might allow the attacker to escalate privilleges.

When overwriting the buffer with "A" (0x41):

Unhandled exception at 0x01003468 in MC.EXE: 0xC0000005: Access violation reading location 0x41414141.
First-chance exception at 0x01003468 in MC.EXE: 0xC0000005: Access violation reading location 0x41414141.

Affected Versions
=================
Microsoft (R) Message Compiler Version 1.00.5239

Solution
=========

Proper bounds-checking.

Kind regards,

Michal Bucko (sapheal)
hack.pl