Multiple vulnerabilities in Microsoft Word



| Updated: 2020-09-15
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-1218
CVE-2020-1338
CWE-ID CWE-119
CWE-122
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Microsoft SharePoint Server
Server applications / Application servers

Microsoft Office
Client/Desktop applications / Office applications

Microsoft Word
Client/Desktop applications / Office applications

Microsoft Office for Mac
Client/Desktop applications / Office applications

Microsoft Office Web Apps
Client/Desktop applications / Office applications

Office Online Server
Server applications / Other server solutions

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated: 15.09.2020

Updated vulnerability #2.

1) Buffer overflow

EUVDB-ID: #VU46472

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-2020-1218

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 a boundary error when processing Microsoft Word files. A remote attacker can create a specially crafted file, trick the victim into opening it, trigger memory corruption 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 SharePoint Server: 2010 - 2019

Microsoft Office: 2010 Service Pack 2 - 2019

Office Online Server: 2016

Microsoft Word: 2010 - 2016

Microsoft Office for Mac: 2016

Microsoft Office Web Apps: 2010 Service Pack 2 - 2013 Service Pack 1

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1218


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.

2) Heap-based buffer overflow

EUVDB-ID: #VU46473

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-2020-1338

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

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 file, trick the victim into opening it, trigger heap-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 SharePoint Server: 2019

Microsoft Office: 2019 for Mac - 2019

Office Online Server: 2016

Microsoft Office for Mac: 2016

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1338
http://www.zerodayinitiative.com/advisories/ZDI-20-1131/


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.



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