CVE-2019-0831 Explained : Impact and Mitigation

Microsoft SharePoint Server Vulnerability

Understanding CVE-2019-0831

This CVE involves a vulnerability in Microsoft SharePoint Server related to cross-site scripting (XSS) attacks.

What is CVE-2019-0831?

The vulnerability arises from inadequate sanitization of specific web requests to affected SharePoint servers.
Also known as 'Microsoft Office SharePoint XSS Vulnerability'.

The Impact of CVE-2019-0831

Allows attackers to execute malicious scripts in the context of the user's browser.
Can lead to unauthorized access, data theft, and other security breaches.

Technical Details of CVE-2019-0831

Vulnerability Description

XSS vulnerability in Microsoft SharePoint Server due to improper input sanitization.

Affected Systems and Versions

Microsoft SharePoint Server 2010 Service Pack 2 and 2019.
Microsoft SharePoint Foundation 2010 Service Pack 2.
Microsoft SharePoint Enterprise Server 2016 and 2013 Service Pack 1.

Exploitation Mechanism

Attackers craft malicious web requests to exploit the XSS vulnerability.

Mitigation and Prevention

Immediate Steps to Take

Apply security updates provided by Microsoft promptly.
Implement web application firewalls to filter and block malicious traffic.

Long-Term Security Practices

Regularly monitor and audit SharePoint server logs for suspicious activities.
Educate users on safe browsing practices and potential phishing attempts.

Patching and Updates

Stay informed about security advisories and patches released by Microsoft for SharePoint products.