CVE-2019-0558 : Security Advisory and Response
Learn about CVE-2019-0558 affecting Microsoft SharePoint products. Understand the impact, technical details, and mitigation steps for this XSS vulnerability.
The Microsoft Office SharePoint XSS Vulnerability affects various Microsoft products, leading to a cross-site scripting issue. Learn about the impact, technical details, and mitigation steps.
Understanding CVE-2019-0558
This CVE involves a vulnerability in Microsoft SharePoint products that could allow attackers to execute cross-site scripting attacks.
What is CVE-2019-0558?
The Microsoft Office SharePoint XSS Vulnerability arises from inadequate sanitization of web requests to vulnerable SharePoint servers, impacting Microsoft SharePoint Server, SharePoint, and Business Productivity Servers.
The Impact of CVE-2019-0558
- Allows attackers to execute cross-site scripting attacks on affected SharePoint servers.
- Affects the confidentiality and integrity of data stored on SharePoint.
Technical Details of CVE-2019-0558
This section delves into the specifics of the vulnerability.
Vulnerability Description
The XSS vulnerability in Microsoft SharePoint Server stems from improper handling of specially crafted web requests, enabling attackers to inject malicious scripts.
Affected Systems and Versions
- Microsoft SharePoint Server 2019
- Microsoft SharePoint Enterprise Server 2013 Service Pack 1
- Microsoft SharePoint Enterprise Server 2016
- Microsoft Business Productivity Servers 2010 Service Pack 2
Exploitation Mechanism
Attackers exploit this vulnerability by sending malicious web requests to vulnerable SharePoint servers, bypassing proper sanitization mechanisms.
Mitigation and Prevention
Protect your systems from CVE-2019-0558 with these essential steps.
Immediate Steps to Take
- Apply security patches provided by Microsoft promptly.
- Implement web application firewalls to filter and block malicious requests.
- Educate users on safe browsing practices to prevent XSS attacks.
Long-Term Security Practices
- Regularly update and patch all Microsoft SharePoint products.
- Conduct security audits and penetration testing to identify and address vulnerabilities.
- Monitor web traffic for suspicious activities that may indicate XSS attempts.
Patching and Updates
- Stay informed about security advisories from Microsoft.
- Keep all SharePoint servers up to date with the latest security patches.