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Secunia Research: Microsoft Windows Type 1 Font Processing Vulnerability



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                    Secunia Research 2016/12/14



	Microsoft Windows Type 1 Font Processing Vulnerability



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Table of Contents



Affected Software....................................................1

Severity.............................................................2

Description of Vulnerability.........................................3

Solution.............................................................4

Time Table...........................................................5

Credits..............................................................6

References...........................................................7

About Flexera Software...............................................8

Verification.........................................................9



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1) Affected Software



* Microsoft Windows 10

* Microsoft Windows 7

* Microsoft Windows 8.1

* Microsoft Windows RT 8.1

* Microsoft Windows Server 2008

* Microsoft Windows Server 2012

* Microsoft Windows Server 2016

* Microsoft Windows Vista



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2) Severity



Rating: Moderately critical

Impact: Privilege escalation, Denial of Service

Where:  From remote



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3) Description of Vulnerability



Secunia Research has discovered a vulnerability in Microsoft Windows,

which can be exploited by malicious, local users to gain escalated 

privileges and by malicious people to cause a DoS (Denial of Service).



The vulnerability is caused due to an error within the win32k.sys

when processing Type 1 fonts, which can be exploited to trigger a 

NULL pointer dereference and subsequently cause a kernel crash or 

gain elevated privileges via a specially crafted PFB font.



The vulnerability is confirmed on a fully patched Windows 7 

Professional (win32k.sys version 6.1.7601.23545).



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4) Solution



Apply update.

https://technet.microsoft.com/library/security/MS16-151



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5) Time Table



2016/12/01 - Vendor notified about vulnerability.

2016/12/06 - Vendor response.

2016/12/13 - Release of Secunia Advisory SA73777.

2016/12/14 - Public disclosure of Secunia Research Advisory.



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6) Credits



Behzad Najjarpour Jabbari, Secunia Research at Flexera Software



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7) References



The Common Vulnerabilities and Exposures (CVE) project has assigned

the CVE-2016-7259 identifier for the vulnerability.



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8) About Flexera Software



Flexera Software helps application producers and enterprises increase

application usage and the value they derive from their software.





http://www.flexerasoftware.com/enterprise/company/about/



Flexera Software  delivers  market-leading  Software  Vulnerability

Management solutions enabling enterprises to proactively identify and

remediate software vulnerabilities, effectively reducing the risk of

costly security breaches.



http://www.flexerasoftware.com/enterprise/products/



Flexera  Software  supports  and  contributes  to  the community in

several ways.  We have always believed that reliable vulnerability

intelligence and tools to aid identifying and fixing vulnerabilities

should be  freely available  for  consumers  to ensure that users,

who care about their online privacy and security, can stay secure.

Only a few vendors address vulnerabilities in a proper way and help

users get updated  and  stay secure.  End-users (whether private

individuals or businesses) are otherwise left largely alone,  and

that is why back in 2002, Secunia Research started investigating,

coordinating  disclosure  and  verifying software vulnerabilities.

In  2016,  Secunia Research  became  a  part  of  Flexera Software

and today our in-house software vulnerability research remains the

core  of  the  Software  Vulnerability  Management  products  at

Flexera Software.



http://secunia.com/secunia_research/



The  public  Advisory database  contains sufficient information  for

researchers, security enthusiasts, and consumers to lookup individual

products and vulnerabilities  and  assess, whether they need to take

any actions to secure their systems or whether a given vulnerability

has already been discovered



http://secunia.com/advisories/



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9) Verification



Please verify this advisory by visiting the Secunia website:

http://secunia.com/secunia_research/2016-19/



Complete list of vulnerability reports published by Secunia Research:

http://secunia.com/secunia_research/



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