Remote code execution in Microsoft Word
| Risk | Critical |
| Patch available | NO |
| Number of vulnerabilities | 1 |
| CVE-ID | N/A |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | This vulnerability is being exploited in the wild. |
| Vulnerable software Subscribe |
Microsoft Office Client/Desktop applications / Office applications Microsoft Word Client/Desktop applications / Office applications |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
UPDATED: 15.11.2018
Added information about active exploitation of the vulnerability in the wild, changed severity vulnerability from high to critical.
This vulnerability is being treated as of now as a zero-day.
1) Logic error
EUVDB-ID: #VU15547
Risk: Critical
CVSSv3.1: 9.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:U/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to a logical bug is revealed when embedding a video via the 'online video' feature. A remote attacker can embed a video inside a Word document, edit the XML file named document.xml, replace the video link with a crafted payload created by the attacker which opens Internet Explorer Download Manager with the embedded code execution file and execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
Note: as of October 31, 2018 the vulnerability is being actively exploited in the wild.
Microsoft Office: 2013 - 2019
Microsoft Word: 2013 - 2016
External linkshttp://blog.cymulate.com/abusing-microsoft-office-online-video
http://blog.trendmicro.com/trendlabs-security-intelligence/hide-and-script-inserted-malicious-urls-...
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.
