CVE-2019-1033 : Security Advisory and Response
Learn about CVE-2019-1033, a cross-site-scripting (XSS) vulnerability in Microsoft SharePoint Server. Find out affected systems, exploitation risks, and mitigation steps.
The 'Microsoft Office SharePoint XSS Vulnerability' is a cross-site-scripting (XSS) security issue affecting various Microsoft products.
Understanding CVE-2019-1033
What is CVE-2019-1033?
This vulnerability occurs when Microsoft SharePoint Server fails to properly sanitize malicious code in web requests, potentially leading to XSS attacks.
The Impact of CVE-2019-1033
This vulnerability could allow attackers to execute malicious scripts in the context of a user's session on the SharePoint server, leading to unauthorized actions.
Technical Details of CVE-2019-1033
Vulnerability Description
The vulnerability arises from inadequate sanitization of web requests, enabling attackers to inject and execute malicious scripts.
Affected Systems and Versions
- Microsoft Project Server 2010 Service Pack 2
- Microsoft SharePoint Foundation 2013 Service Pack 1
- Microsoft SharePoint Enterprise Server 2016
- Microsoft SharePoint Server 2019
Exploitation Mechanism
Attackers can exploit this vulnerability by crafting a specially designed web request to the affected SharePoint server, injecting malicious scripts.
Mitigation and Prevention
Immediate Steps to Take
- Apply security updates provided by Microsoft promptly.
- Implement web application firewalls to filter and block malicious requests.
Long-Term Security Practices
- Regularly monitor and audit web application logs for suspicious activities.
- Train users and administrators on identifying and reporting potential security threats.
Patching and Updates
Ensure that all Microsoft SharePoint servers are updated with the latest security patches to mitigate the risk of XSS attacks.