CVE-2019-0556 Explained : Impact and Mitigation

Microsoft SharePoint Server is affected by a cross-site-scripting (XSS) vulnerability, known as "Microsoft Office SharePoint XSS Vulnerability". This CVE ID is distinct from others in the same year.

Understanding CVE-2019-0556

A XSS vulnerability in Microsoft SharePoint Server allows specially crafted web requests to bypass server sanitization, potentially leading to security breaches.

What is CVE-2019-0556?

The vulnerability in Microsoft SharePoint Server enables attackers to execute malicious scripts on web browsers of users accessing the affected server.

The Impact of CVE-2019-0556

Attackers can exploit this vulnerability to perform various malicious actions, such as stealing sensitive data or impersonating users.

Technical Details of CVE-2019-0556

Microsoft SharePoint Server's XSS vulnerability has the following technical aspects:

Vulnerability Description

The flaw arises from inadequate sanitization of specific web requests, allowing malicious scripts to execute.

Affected Systems and Versions

Product: Microsoft SharePoint
Vendor: Microsoft
Version: Enterprise Server 2013 Service Pack 1

Exploitation Mechanism

Attackers craft web requests with malicious scripts that are not properly sanitized by the SharePoint server, leading to XSS attacks.

Mitigation and Prevention

To address CVE-2019-0556, follow these steps:

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Implement web application firewalls to filter and block malicious traffic.
Educate users on identifying and avoiding suspicious links or content.

Long-Term Security Practices

Regularly update and patch software to prevent vulnerabilities.
Conduct security audits and penetration testing to identify and address potential weaknesses.

Patching and Updates

Stay informed about security advisories from Microsoft and apply patches as soon as they are released.