#VU5662 Improper input validation in Microsoft products - CVE-2015-2455

Vulnerability identifier: #VU5662

Vulnerability risk: High

CVSSv4.0: 7.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2015-2455

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Live Meeting
Client/Desktop applications / Messaging software
Microsoft Lync
Client/Desktop applications / Messaging software
Microsoft Silverlight
Client/Desktop applications / Plugins for browsers, ActiveX components
Microsoft .NET Framework
Server applications / Frameworks for developing and running applications

Vendor: Microsoft

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

The vulnerability exists due to improper handling of TrueType fonts by Windows Adobe Type Manager Library. A remote attacker can create a specially crafted document containing embedded TrueType font, trick the victim into opening it and execute arbitrary code with privileges of the current user.

Successful exploitation of this vulnerability results in arbitrary code execution on the vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Windows: RT, Vista, 7, 8 - 8.1, 10

Windows Server: 2008 R2 - 2008, 2012 R2 - 2012

Microsoft Office: 2007, 2010

Microsoft Live Meeting: 2007 Console

Microsoft Lync: 2010, 2013

Microsoft Silverlight: 5

Microsoft .NET Framework: 3.0, 3.5 - 3.5.1, 4.0, 4.5.1 - 4.5.2, 4.6

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External links
https://technet.microsoft.com/en-us/library/security/ms15-080.aspx

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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. However, proof of concept for this vulnerability is available.