BugTraq
COM+ Services DLL side loading vulnerability Dec 12 2015 09:10AM
Securify B.V. (lists securify nl)
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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__an
d_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_load
ing_vulnerability.html

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