COM+ Services DLL side loading vulnerability

From: Securify B.V. <lists@securify.nl>
To: bugtraq@securityfocus.com
Cc:
Subject: COM+ Services DLL side loading vulnerability
Date:


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COM+ Services DLL side loading vulnerability
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Yorick Koster, August 2015

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Abstract
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A DLL side loading vulnerability was found in the COM+ Services
component that ships with Windows. This issue can be exploited by
loading the QC Queue Administration Class as an embedded OLE object.
When instantiating the object Windows will try to load the DLL mqrt.dll
from the current working directory. If an attacker convinces the user to
open a specially crafted (Office) document from a directory also
containing the attacker's DLL file, it is possible to execute arbitrary
code with the privileges of the target user. This can potentially result
in the attacker taking complete control of the affected system.

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See also
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-6132
https://technet.microsoft.com/library/security/MS15-132
https://code.google.com/p/google-security-research/issues/detail?id=556
https://advisory.securify.nl/blog/SFY20151201/there_s_a_party_in_ole__and_you_are_invited.html

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Tested versions
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This issue was successfully verified on Windows 7 + Office 2007 32-bit,
Windows Vista + Office 2010 32-bit, Windows 7/10 + Office 2013 32-bit,
and Windows 10 + Office 2016 64-bit.

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Fix
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Microsoft released MS15-132 that fixes this vulnerability.

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Details
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https://www.securify.nl/advisory/SFY20150801/com__services_dll_side_loading_vulnerability.html 





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