Secunia Research: Microsoft Windows and Office Embedded OpenType Font Engine Memory Corruption Vulnerability

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                    Secunia Research 2018/09/17

     Microsoft Windows and Office Embedded OpenType Font Engine
                  Memory Corruption 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 .......................................................8
Verification.........................................................9

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1) Affected Software

* Microsoft Windows 7

* Microsoft Windows Server 2008

* Microsoft Windows 8.1

* Microsoft Windows RT 8.1

* Microsoft Windows Server 2012

* Microsoft Windows 10

* Microsoft Windows Server 2016

* Microsoft Office 2016

* Microsoft Office 2016 Click-to-Run

* Microsoft Office 2016 for Mac

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2) Severity

Rating: Highly critical
Impact: System access
Where:  Remote

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3) Description of Vulnerability

Secunia Research has discovered a vulnerability in Microsoft
Windows, which can be exploited by malicious people to compromise a
vulnerable system.

1) An error within the t2embed.dll module when processing font files
can be exploited to corrupt memory and subsequently execute arbitrary
code.

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4) Solution

Apply update.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8332

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5) Time Table

2018/06/28 - Vendor notified about vulnerability.
2018/06/29 - Vendor response.
2018/06/29 - Vendor status update.
2018/07/03 - Vendor status update.
2018/09/11 - Vendor patch release.
2018/09/11 - Secunia Advisories SA83777, SA85126, SA85125, and
             SA85074 release. Secunia Advisory SA84939 update.
2018/09/17 - Public disclosure of Secunia Research Advisory.

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6) Credits

Hossein Lotfi, Secunia Research at Flexera.

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7) References

The Common Vulnerability and Exposures (CVE) project has assigned the
CVE-2018-8332 identifier for the vulnerability.

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8) About Flexera
 
Flexera  helps  application  producers  and  enterprises  increase
application usage and the value they derive from their software.

http://www.flexera.com

Flexera delivers market-leading Software Vulnerability Management
solutions  enabling  enterprises  to  proactively  identify  and
remediate software vulnerabilities, effectively reducing the risk of
costly security breaches.

https://www.flexera.com/enterprise/products/

Flexera  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 and today
our in-house software vulnerability research remains the core of
the Software Vulnerability Management products at Flexera.

https://www.flexera.com/enterprise/company/about/secunia-research/

The  public Secunia Advisory database  contains  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.

https://secuniaresearch.flexerasoftware.com/community/advisories/

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9) Verification

Please verify this advisory by visiting the Secunia website:
https://secuniaresearch.flexerasoftware.com/secunia_research/2018-17/

Complete list of vulnerability reports published by Secunia Research:
http://secunia.com/secunia_research/

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