Vulnerability identifier: #VU5465

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-2015-1650

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications
Microsoft Office Web Apps
Client/Desktop applications / Office applications
Microsoft SharePoint Server
Server applications / Application servers

Vendor: Microsoft

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

The weakness exists due to use-after-free error when processing Microsoft Word documents. A remote attacker can create a specially crafted Microsoft Word document, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Office: 2010, 2007, 2013 - 2013 RT

Microsoft Word:

Microsoft SharePoint Server: 2010 - 2013

Microsoft Office Web Apps: 2010 Service Pack 2 - 2013 Service Pack 1

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External links
http://technet.microsoft.com/en-us/library/security/ms15-033.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.