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Files Date: 2015-12-13

Windows Authentication UI DLL Hijack
Posted Dec 13, 2015
Authored by Yorick Koster, Securify B.V.

A DLL side loading vulnerability was found in the Windows Authentication UI DLL. This issue can be exploited by loading the Slide To Shut Down Screen object as an embedded OLE object. When instantiating the object Windows will try to load the DLL wuaext.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.

tags | advisory, arbitrary
systems | windows
advisories | CVE-2015-6132
SHA-256 | b2bb672c4c110c7c16d0e9ef991684cd7daa9c8d8c09eced5e54ae7fe67e03c2
Event Viewer Snapin DLL Hijack
Posted Dec 13, 2015
Authored by Yorick Koster, Securify B.V.

Multiple DLL side loading vulnerabilities were found in the Event Viewer Snapin that ships with Windows. These issues can be exploited by loading various COM components as an embedded OLE object. When instantiating vulnerable object Windows will try to load the DLL elsext.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.

tags | advisory, arbitrary, vulnerability
systems | windows
advisories | CVE-2015-6132
SHA-256 | ff6eb730c87054d650838455d83f9cca8cb8c8d8b89144297dc18cce97b656bd
COM+ Service DLL Hijack
Posted Dec 13, 2015
Authored by Yorick Koster, Securify B.V.

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.

tags | advisory, arbitrary
systems | windows
advisories | CVE-2015-6132
SHA-256 | 414f5627fbbd2443682471bf2dc35edb9723e7ade491a45806779d961f625826
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