CVE-2021-43876 Explained : Impact and Mitigation
Learn about CVE-2021-43876, a HIGH severity Elevation of Privilege vulnerability in Microsoft SharePoint with a CVSS score of 8.8. Find out affected systems, exploitation risks, and mitigation steps.
Microsoft SharePoint Elevation of Privilege Vulnerability was published on 2021-12-29 and has a CVSS base score of 8.8 (High).
Understanding CVE-2021-43876
What is CVE-2021-43876?
The CVE-2021-43876 relates to an Elevation of Privilege vulnerability in Microsoft SharePoint.
The Impact of CVE-2021-43876
The vulnerability has a base severity rating of HIGH (8.8 CVSS score) and can allow attackers to elevate privileges.
Technical Details of CVE-2021-43876
Vulnerability Description
The vulnerability in Microsoft SharePoint can lead to an attacker gaining elevated privileges within affected systems.
Affected Systems and Versions
- Microsoft SharePoint Enterprise Server 2016 (16.0.0 to 16.0.5254.1000)
- Microsoft SharePoint Enterprise Server 2013 Service Pack 1 (15.0.0 to 15.0.5407.1000)
- Microsoft SharePoint Server 2019 (16.0.0 to 16.0.10381.20001)
Exploitation Mechanism
Attackers can exploit this vulnerability on x64-based Systems to manipulate the SharePoint environment.
Mitigation and Prevention
Immediate Steps to Take
- Apply security updates provided by Microsoft.
- Monitor and restrict user access to critical SharePoint resources.
Long-Term Security Practices
- Regularly update and patch SharePoint servers.
- Implement the principle of least privilege to restrict user access.
- Conduct security assessments and penetration testing on SharePoint deployments.
Patching and Updates
Regularly check for security updates from Microsoft and apply them promptly.