Vulnerability identifier: #VU5293

Vulnerability risk: High

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2015-2470

CWE-ID: CWE-191

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Office for Mac
Client/Desktop applications / Office applications
Microsoft Word
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to integer underflow when processing Microsoft Office files. A remote attacker can trick the victim into opening a specially crafted Office file and execute arbitrary commands on the target system with privileges of the current user.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Install updates from Microsoft website.

Vulnerable software versions

Microsoft Office: 2007, 2010, 2013 - 2013 RT

Microsoft Office for Mac: 2011

Microsoft Word:

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External links
http://technet.microsoft.com/en-us/library/security/ms15-081.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.