Vulnerability identifier: #VU20261

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1201

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

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

Vendor: Microsoft

Description

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

The vulnerability exists due to a boundary error when processing Microsoft Word files. A remote attacker can create a specially crafted Office document, trick the victim into opening it, trigger stack-based buffer overflow and execute arbitrary code on the target system.

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

Mitigation
Install update from vendor's website.

Vulnerable software versions

Microsoft Office for Mac: 2016

Microsoft Office: 2010 Service Pack 2, 2019 - 2019 for Mac, 365 ProPlus

Microsoft Word:

Microsoft Office Web Apps: 2010 Service Pack 2

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1201
http://www.zerodayinitiative.com/advisories/ZDI-19-715/

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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.