Remote code execution in Microsoft Office

Published: 2017-10-10
Severity Critical
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2017-11826
CWE ID CWE-119
Exploitation vector Network
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Microsoft Office Subscribe
Microsoft Word
Vendor Microsoft

Security Advisory

This security advisory describes one critical risk vulnerability.

1) Memory corruption

Severity: Critical

CVSSv3: 9.2 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C] [PCI]

CVE-ID: CVE-2017-11826

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Description

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

The weakness exists due to boundary error when handling malicious content. A remote attacker can send a specially crafted .doc file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with system privileges.

Successful exploitation of the vulnerability may result in system compromise.

Note: the vulnerability is being actively exploited.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Microsoft Office: 2007, 2010, 2013

Microsoft Word: 2007, 2010, 2013

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11826

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 an attachment in an e-mail message.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.