CVE-2021-31964 : Exploit Details and Defense Strategies

A detailed overview of the Microsoft SharePoint Server Spoofing Vulnerability CVE-2021-31964.

Understanding CVE-2021-31964

This section will cover what CVE-2021-31964 is, its impact, technical details, and mitigation strategies.

What is CVE-2021-31964?

The Microsoft SharePoint Server Spoofing Vulnerability, tracked as CVE-2021-31964, allows an attacker to carry out spoofing attacks on affected systems.

The Impact of CVE-2021-31964

This vulnerability has a high severity level with a CVSS base score of 7.6. Attackers can exploit this vulnerability to conduct spoofing attacks, posing a significant risk to affected systems.

Technical Details of CVE-2021-31964

Here we will delve into the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerability in Microsoft SharePoint Server allows spoofing attacks, enabling threat actors to impersonate legitimate users or entities.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016 version 16.0.0 to less than 16.0.5173.1000
Microsoft SharePoint Server 2019 version 16.0.0 to less than 16.0.10375.20000
Microsoft SharePoint Foundation 2013 Service Pack 1 version 15.0.0 to less than 15.0.5353.1000

Exploitation Mechanism

Attackers can exploit this vulnerability by impersonating legitimate users or entities on the affected Microsoft SharePoint Server instances.

Mitigation and Prevention

In this section, we will discuss immediate steps to take, long-term security practices, and the importance of patching and updates.

Immediate Steps to Take

Apply security updates provided by Microsoft to address the CVE-2021-31964 vulnerability.
Monitor for any suspicious activities on the SharePoint servers.

Long-Term Security Practices

Regularly update and patch SharePoint servers to prevent exploitation of known vulnerabilities.
Implement network segmentation and access controls to limit exposure.

Patching and Updates

Keep all software and systems up to date with the latest security patches and fixes to ensure protection against potential threats.