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Re: Microsoft Jet Engine MDB File Parsing Stack Overflow Vulnerability
From: jf <jf () danglingpointers net>
Date: Sun, 18 Nov 2007 08:27:29 +0000 (UTC)

is it? If I recall correctly, the hexview advisory was the result of
something like a word-to-byte truncation followed by a byte
sign-extension (but its been long enough that I may be misremembering
it)

In this advisory it was not entirely clear what
the condition was, from what I remember reading of it the other day, it
didn't get into how/why, it just like used ecx or a register as a counter
but didn't show how it came to that value?

Whats interesting is that the hexview patching the bug itself is trivial
from the assembly (not taking into account the work encountered from bin patching
itself) and I know many organizations attempted to put a lot of pressure
to get it patched and failed to do so

On Sun, 18 Nov 2007, Juha-Matti Laurio wrote:

Date: Sun, 18 Nov 2007 01:58:02 +0200 (EET)
From: Juha-Matti Laurio <juha-matti.laurio () netti fi>
To: CaseArmour.net Security Administrator <security () casearmour net>,
    bugtraq () securityfocus com, frankruder () hotmail com,
    full-disclosure () lists grok org uk
Subject: Re: [Full-disclosure] Microsoft Jet Engine MDB File Parsing Stack
    Overflow Vulnerability

There is a well-known unpatched code execution type vulnerability reported originally in msjet40.dll version 
4.00.8618.0 too.
This issue reported by HexView is known since March 2005:

http://www.securityfocus.com/bid/12960
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-0944

We probably don't see a fix for this issue.

- Juha-Matti

"CaseArmour.net Security Administrator" <security () casearmour net> kirjoitti:
It would be useful to know if this is also an issue with msjet40.dll
4.0.9510.0 (Windows Server 2003 SP2 + hotfixes).  I have an installer
for Windows XP SP2 that -- seems -- to cleanly apply Windows Server 2003
SP2's MDAC 2.82.  I haven't been able to give it a serious, hard testing
because I don't have many apps that still use MDAC.

On Fri, 16 Nov 2007 19:25:29 +0800, "cocoruder" <cocoruder () gmail com>
said:

    (C:\Windows\System32\msjet40.dll, version is 4.0.8618.0)

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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/


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