CVE-2021-1641 Explained : Impact and Mitigation

Microsoft SharePoint Server Spoofing Vulnerability was published on January 12, 2021. It impacts Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Foundation 2013 Service Pack 1, and Microsoft SharePoint Server 2019 on x64-based Systems.

Understanding CVE-2021-1641

This CVE involves a Spoofing vulnerability in Microsoft SharePoint Server.

What is CVE-2021-1641?

CVE-2021-1641 is a Spoofing vulnerability affecting Microsoft SharePoint Server, allowing an attacker to impersonate another entity.

The Impact of CVE-2021-1641

The impact of this vulnerability is rated as MEDIUM. It has a CVSS base score of 4.6. Successful exploitation could lead to various levels of information compromise.

Technical Details of CVE-2021-1641

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Microsoft SharePoint Server allows attackers to spoof another entity, potentially leading to unauthorized actions.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016 (Version 16.0.0)
Microsoft SharePoint Foundation 2013 Service Pack 1 (Version 15.0.0)
Microsoft SharePoint Server 2019 (Version 16.0.0)

Exploitation Mechanism

The vulnerability can be exploited by an attacker to trick a user or a system into believing they are interacting with a trusted entity when, in fact, it is malicious.

Mitigation and Prevention

To secure systems against CVE-2021-1641, follow the below measures.

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft.
Monitor for any suspicious activities.

Long-Term Security Practices

Regularly update and patch Microsoft SharePoint Server.
Conduct security training to educate users on recognizing spoofing attempts.

Patching and Updates

Ensure all systems running Microsoft SharePoint Server are patched with the latest security updates to mitigate the risk of exploitation.