Vulnerability identifier: #VU8316

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-8696

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Windows Server
Operating systems & Components / Operating system
Windows
Operating systems & Components / Operating system
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications
Microsoft Office Web Apps
Client/Desktop applications / Office applications
Skype for Business
Client/Desktop applications / Messaging software
Microsoft Lync
Client/Desktop applications / Messaging software
Microsoft Live Meeting
Client/Desktop applications / Messaging software
Lync Attendee
Client/Desktop applications / Messaging software

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

A remote code execution vulnerability exists due to the way Windows Uniscribe handles objects in memory.  A remote unauthenticated attacker can execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2008 - 2008 R2

Microsoft Office: 2010 Service Pack 2, 2007

Microsoft Word:

Microsoft Office Web Apps: 2010 Service Pack 2

Skype for Business: 2016

Microsoft Lync:

Microsoft Live Meeting: 2007 Add-in - 2007 Console

Windows: 7

Lync Attendee: 2010

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8696

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.