Multiple vulnerabilities in Microsoft Excel



Published: 2021-04-13
Risk High
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2021-28454
CVE-2021-28451
CVE-2021-28456
CWE-ID CWE-94
CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Microsoft Office
Client/Desktop applications / Office applications

Microsoft Excel
Client/Desktop applications / Office applications

Office Online Server
Server applications / Other server solutions

Microsoft Office Web Apps Server
Server applications / Application servers

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Code Injection

EUVDB-ID: #VU52110

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-28454

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file or visit a malicious website and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2010 Service Pack 2 - 2019

Office Online Server : 2016

Microsoft Excel: 2010 - 2016

Microsoft Office Web Apps Server: 2013 Service Pack 1


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28454

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

2) Code Injection

EUVDB-ID: #VU52111

Risk: High

CVSSv3.1:

CVE-ID: CVE-2021-28451

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file or visit a malicious website and execute arbitrary code on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019 - 2019 for Mac

Office Online Server : 2016

Microsoft Excel: 2013 - 2016

Microsoft Office Web Apps Server: 2013 Service Pack 1


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28451

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?

3) Information disclosure

EUVDB-ID: #VU52112

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2021-28456

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in Microsoft Excel. A remote attacker can trick a victim to open a specially crafted file or visit a malicious website and gain unauthorized access to sensitive information on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office: 2019 - 2019 for Mac

Office Online Server : 2016

Microsoft Excel: 2010 - 2016

Microsoft Office Web Apps Server: 2013 Service Pack 1


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28456

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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