93539 : Microsoft Windows win32k.sys EPATHOBJ::pprFlattenRec / EPATHOBJ::bFlatten Functions Local Privilege Escalation
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
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Disclosure Date
Days of Exposure
36 days


Microsoft Windows contains a flaw in win32k.sys that leads to unauthorized privileges being gained. The issue is due to the EPATHOBJ::pprFlattenRec and EPATHOBJ::bFlatten functions failing to properly initialize the next list pointer. This may allow a local attacker to gain elevated privileges.


Location: Local Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Solution: Patch / RCS
Exploit: Exploit Public
Disclosure: Vendor Verified, Third-party Verified, Uncoordinated Disclosure
OSVDB: Authentication Required


Microsoft has released a patch to address this vulnerability. There are no known workarounds or upgrades to correct this issue. Check the Microsoft Security Bulletin in the references section for details.


Microsoft Corporation
Windows 7



CVSSv2 Score

CVSSv2 Base Score = 4.9
Source: nvd.nist.gov | Generated: 2013-05-28 | Disagree? | There are 3 more: View All

Access_vector_0 Access_complexity_2 Authentication_2 Confidentiality_impact_0 Integrity_impact_0 Availability_impact_2


Anonymous - 2013/07/10 18:44:30

The PATCH publicized by PCAdvisor somehow led me here...and here I find nothing that refers overtly to Patch CVE-2013-3660.
What I did find on this page is mind-twisting, to say the least. Is a person who is not a TECH supposed to be able to deal with whatever is written above?

AND: What in the world is up with what I hear about there being no Windows XP support after a certain date in 2014? Meaning of all the hoohah I can find online seems to come down to "And all people who use WXP will have to (HAVE TO) use W7...or perhaps W8..."
Well plainly and simply, this is coercion. Last time I checked there were United States laws against coercion.

Some brilliant person burbled "Well just run WXP and W7 side by side," WHATEVER THAT MIGHT MEAN, "and you will be able to figure out the differences between the two."

Fine. I have NO idea whatsoever how that side-by-side running is accomplished.

It would be very nice if whoever is handling the whatever it is above here referring to:
"93539 : Microsoft Windows win32k.sys EPATHOBJ::pprFlattenRec / EPATHOBJ::bFlatten Functions Local Privilege Escalation"....could have done the kindness of explaining just what the bleep this thing is about, how one might or might not use/want/need it, and so on.
Thanks very much.

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