Microsoft PowerPointViewer Code Execution Mar 01 2016 04:13AM
hyp3rlinx lycos com
[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source: http://hyp3rlinx.altervista.org/advisories/MICROSOFT-PPT-VIEWER-CODE-EXE


Microsoft PowerPoint Viewer
version: 12.0.6600.1000

Vulnerability Type:
DLL Hijack Arbitrary Code Execution

Vulnerability Details:

Microsoft PowerPoint Viewer 'POWERPNT.EXE' will execute arbitrary code if an attacker can place a DLL named "api-ms-win-appmodel-runtime-l1-1-0.dll" in users
downloads directory. This exploit does NOT rely on any embedded OLE objects or CLSID registered COM objects in the document to execute.

1) create malicious DLL named "api-ms-win-appmodel-runtime-l1-1-0.dll"

2) place DLL in users downloads directory via download driveby etc...

3) open an existing .PPT document from the downloads directory e.g. "C:\Users\Downloads\somefile.ppt"

then BOOOOOM ...

Tested on: Windows 7 SP1 x64

Disclosure Timeline:
Vendor Notification: February 23, 2016
vendor replies DLL side loading issue already publicly known.

a google search returned following results:

1) examples using embedded OLE objects and MS Word etc
2) old posts
3) examples not referencing "api-ms-win-appmodel-runtime-l1-1-0.dll" DLL

February 29, 2016 : Public Disclosure.

Severity Level:


vulnerable DLL: "api-ms-win-appmodel-runtime-l1-1-0.dll"
Vulnerable Product: Microsoft PowerPoint Viewer 'POWERPNT.EXE'


[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author.
The author is not responsible for any misuse of the information contained herein and prohibits any malicious use of all security related information or exploits by the author or elsewhere.

by hyp3rlinx

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