CVE-2021-38651 Explained : Impact and Mitigation
Learn about CVE-2021-38651, a spoofing vulnerability in Microsoft SharePoint Server affecting versions 2016, 2019, and 2013 SP1. Understand the impact and mitigation steps.
A spoofing vulnerability in Microsoft SharePoint Server has been identified and detailed below.
Understanding CVE-2021-38651
This section provides an overview of the CVE-2021-38651 vulnerability affecting Microsoft SharePoint Server.
What is CVE-2021-38651?
The CVE-2021-38651 is a spoofing vulnerability in Microsoft SharePoint Server. It was published on September 15, 2021, by Microsoft with a CVSS base score of 7.6, indicating a high severity level.
The Impact of CVE-2021-38651
The impact of this vulnerability includes the ability for an attacker to spoof content or impersonate another entity, leading to potential phishing attacks or unauthorized access to sensitive information.
Technical Details of CVE-2021-38651
In this section, the technical details of the CVE-2021-38651 vulnerability are outlined.
Vulnerability Description
The vulnerability affects multiple versions of Microsoft SharePoint Server, including SharePoint Enterprise Server 2016, SharePoint Server 2019, and SharePoint Foundation 2013 Service Pack 1. It allows attackers to carry out spoofing attacks.
Affected Systems and Versions
The affected platforms for this vulnerability are x64-based systems. Specific vulnerable versions include SharePoint Enterprise Server 2016 version 16.0.0 (less than 5215.1000), SharePoint Server 2019 version 16.0.0 (less than 10378.20002), and SharePoint Foundation 2013 SP1 version 15.0.0 (less than 5381.1000).
Exploitation Mechanism
The exploitation of CVE-2021-38651 involves exploiting the spoofing vulnerability in the affected Microsoft SharePoint Server versions, potentially leading to unauthorized actions by threat actors.
Mitigation and Prevention
This section focuses on the steps to mitigate and prevent exploitation of the CVE-2021-38651 vulnerability.
Immediate Steps to Take
Users and administrators are advised to apply the necessary security updates provided by Microsoft to patch the vulnerability. It is crucial to stay informed about security advisories related to SharePoint Server.
Long-Term Security Practices
Implementing secure configuration practices, network segmentation, and regular security audits can help enhance the overall security posture and prevent similar vulnerabilities from being exploited.
Patching and Updates
Regularly monitor official Microsoft sources for security updates and patches related to Microsoft SharePoint Server to ensure that systems are protected from known vulnerabilities.