CVE-2021-34467 : Vulnerability Insights and Analysis

Microsoft SharePoint Server Remote Code Execution Vulnerability was published on July 16, 2021. It affects Microsoft SharePoint Enterprise Server 2016, Microsoft SharePoint Server 2019, and Microsoft SharePoint Foundation 2013 Service Pack 1.

Understanding CVE-2021-34467

This vulnerability poses a threat of remote code execution in the affected Microsoft SharePoint Server versions.

What is CVE-2021-34467?

The CVE-2021-34467 is a remote code execution vulnerability in Microsoft SharePoint Server, allowing attackers to execute arbitrary code on the target system.

The Impact of CVE-2021-34467

The impact of this vulnerability is rated as HIGH with a CVSS base severity score of 7.1. It can result in unauthorized access, data manipulation, and potential system compromise.

Technical Details of CVE-2021-34467

In this section, we will delve into the specifics of the vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to execute code on the affected SharePoint Server instances, compromising the system's integrity.

Affected Systems and Versions

The vulnerability affects Microsoft SharePoint Enterprise Server 2016 (version 16.0.0 to less than 16.0.5188.1000), Microsoft SharePoint Server 2019 (version 16.0.0 to less than 16.0.10376.20001), and Microsoft SharePoint Foundation 2013 Service Pack 1 (version 15.0.0 to less than 15.0.5363.1000).

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a malicious request to the affected SharePoint Server, potentially leading to remote code execution.

Mitigation and Prevention

To safeguard systems from CVE-2021-34467, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Apply the latest security updates provided by Microsoft for the affected SharePoint Server versions.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Implement the principle of least privilege to limit user access rights and reduce the attack surface.
Regularly patch and update the SharePoint Server to address any existing vulnerabilities.

Patching and Updates

Microsoft has released security updates to address CVE-2021-34467. It is crucial to apply these patches promptly to secure the SharePoint Server from potential threats.