CVE-2021-31963 : Security Advisory and Response

Microsoft SharePoint Server Remote Code Execution Vulnerability was published on June 8, 2021, with a CVSS base score of 7.1.

Understanding CVE-2021-31963

This CVE pertains to a Remote Code Execution vulnerability in Microsoft SharePoint Server, impacting various versions.

What is CVE-2021-31963?

CVE-2021-31963 refers to a critical vulnerability in Microsoft SharePoint Server that allows remote attackers to execute arbitrary code.

The Impact of CVE-2021-31963

This vulnerability has been rated with a CVSS base severity of HIGH (7.1), posing a significant risk to organizations using affected versions of Microsoft SharePoint Server.

Technical Details of CVE-2021-31963

Let's delve into the specifics of this vulnerability.

Vulnerability Description

The vulnerability enables threat actors to remotely execute malicious code on systems running Microsoft SharePoint Server, potentially leading to system compromise.

Affected Systems and Versions

The following versions of Microsoft SharePoint Server are affected:

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

Exploitation Mechanism

The exploitation of this vulnerability involves the execution of malicious code remotely, possibly leading to unauthorized access and control over the affected systems.

Mitigation and Prevention

Here are the steps to mitigate the risks associated with CVE-2021-31963.

Immediate Steps to Take

Apply security updates provided by Microsoft to patch the vulnerability.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch Microsoft SharePoint Server to prevent similar vulnerabilities.
Implement network segmentation and access controls to limit the attack surface.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches released by Microsoft to address CVE-2021-31963.