Remote code execution in Microsoft Office

1) Memory corruption

EUVDB-ID: #VU964

Risk: Critical

CVSSv3.1: 9.2 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2016-7193

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The weakness exists due to boundary error when handling of malicious RTF files by Microsoft Word. A remote attacker can create a specially crafted RTF document, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation of the vulnerability will result in arbitrary code execution.

Note: the vulnerability was being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Office: 2007 - 2016

Microsoft Office Compatibility Pack: Service Pack 3

Microsoft Office for Mac: 2011 - 2016

Office Online Server : 1.0

Microsoft Word: 2007 - 2013

Word Viewer: 2007

Word Automation Services on Microsoft SharePoint Server: 2010 - 2013

External links

http://technet.microsoft.com/en-us/library/security/MS16-121

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.