Denial of service in Microsoft Excel



Published: 2022-08-10
Risk High
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2022-33648
CVE-2022-33631
CWE-ID CWE-20
CWE-254
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe
Office Online Server
Server applications / Other server solutions

Microsoft Office LTSC 2021
Other software / Other software solutions

Microsoft Office
Client/Desktop applications / Office applications

Microsoft Excel
Client/Desktop applications / Office applications

Microsoft 365 Apps for Enterprise
Client/Desktop applications / Other client software

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU66344

Risk: High

CVSSv3.1:

CVE-ID: CVE-2022-33648

CWE-ID: CWE-20 - Improper Input Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in the Microsoft Excel. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Office Online Server : All versions


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33648

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

2) Security features bypass

EUVDB-ID: #VU66345

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2022-33631

CWE-ID: CWE-254 - Security Features

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to security feature bypass issue in Microsoft Excel. A remote user can trick a victim to open a specially crafted file and bypass the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Office LTSC 2021: 32 bit editions - 64 bit editions

Microsoft Office: 2019

Microsoft Excel: 2013 RT Service Pack 1 - 2016

Microsoft 365 Apps for Enterprise: 32-bit Systems - 64-bit Systems


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-33631

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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