Two remote code execution vulnerabilities in Microsoft Word

Published: 2017-05-09

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-0254 CVE-2017-0281
CWE-ID	CWE-119
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Microsoft Word Client/Desktop applications / Office applications Microsoft Office Client/Desktop applications / Office applications Microsoft Office for Mac Client/Desktop applications / Office applications Microsoft Word for Mac Client/Desktop applications / Office applications Microsoft Office Compatibility Pack Client/Desktop applications / Office applications Microsoft Project Client/Desktop applications / Office applications Word Automation Services on Microsoft SharePoint Server Server applications / Other server solutions Microsoft SharePoint Server Server applications / Application servers Microsoft SharePoint Foundation Server applications / Application servers Skype for Business Client/Desktop applications / Messaging software
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory corruption

EUVDB-ID: #VU6452

Risk: High

CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-0254

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 vulnerability exists due to boundary error when processing Microsoft Word documents. A remote unauthenticated attacker can create a specially crafted Word document, trick the victim into opening it and execute arbitrary code on the target system with privileges of the current user.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Word: 2007 - 2016

Microsoft Office: 2007 - 2016

Microsoft Office for Mac: 2011 - 2016

Microsoft Word for Mac: 2011 - 2016

Microsoft Office Compatibility Pack: Service Pack 3

Word Automation Services on Microsoft SharePoint Server: 2010 - 2013 Service Pack 1

Microsoft SharePoint Server: 2016

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0254

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?

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

2) Memory corruption

EUVDB-ID: #VU6456