Multiple vulnerabilities in Microsoft Word



Published: 2021-01-12
Risk High
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2021-1715
CVE-2021-1716
CWE ID CWE-20
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Microsoft SharePoint Server
Server applications / Application servers

Microsoft Office Web Apps Server
Server applications / Application servers

Microsoft Office
Client/Desktop applications / Office applications

Microsoft Word
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 Advisory

1) Input validation error

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] [PCI]

CVE-ID: CVE-2021-1715

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Word. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SharePoint Server: 2010, 2013, 2016, 2019

Microsoft Office: 2010 Service Pack 2, 2019, 2019 for Mac

Office Online Server : 2016

Microsoft Word: 2010, 2013 RT Service Pack 1, 2013 Service Pack 1, 2016

Microsoft Office Web Apps: 2010 Service Pack 2

Microsoft Office Web Apps Server: 2013 Service Pack 1

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1715

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) Input validation error

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] [PCI]

CVE-ID: CVE-2021-1716

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft Word. A remote attacker can pass specially crafted input to the application and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office Web Apps Server: 2013 Service Pack 1

Microsoft SharePoint Server: 2010, 2013, 2016, 2019

Microsoft Office: 2010 Service Pack 2, 2019, 2019 for Mac

Office Online Server : 2016

Microsoft Word: 2010, 2013 RT Service Pack 1, 2013 Service Pack 1, 2016

Microsoft Office Web Apps: 2010 Service Pack 2

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1716

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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