CVE-2020-0923 : Security Advisory and Response

A cross-site-scripting (XSS) vulnerability in Microsoft SharePoint Server allows specially crafted web requests, known as 'Microsoft Office SharePoint XSS Vulnerability'.

Understanding CVE-2020-0923

This CVE involves a cross-site-scripting vulnerability in Microsoft SharePoint Server that could lead to a security issue.

What is CVE-2020-0923?

A cross-site-scripting (XSS) vulnerability occurs when a web application allows users to inject malicious scripts into web pages viewed by other users.

The Impact of CVE-2020-0923

Exploitation of this vulnerability could allow an attacker to execute malicious scripts in the context of the user's browser.
This could potentially lead to the theft of sensitive information, session hijacking, or unauthorized actions on behalf of the user.

Technical Details of CVE-2020-0923

This section delves into the specific technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from Microsoft SharePoint Server failing to properly sanitize specially crafted web requests.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Enterprise Server 2013 Service Pack 1
Microsoft SharePoint Server 2019
Microsoft SharePoint Foundation 2013 Service Pack 1

Exploitation Mechanism

An attacker could exploit this vulnerability by sending a specially crafted web request to a vulnerable SharePoint server.

Mitigation and Prevention

Tips to address and prevent exploitation of the vulnerability.

Immediate Steps to Take

Apply patches provided by Microsoft to address the vulnerability.
Ensure web application security best practices are implemented to mitigate XSS vulnerabilities.

Long-Term Security Practices

Regularly update and patch software to protect against known vulnerabilities.
Conduct security assessments and audits to identify and address weaknesses.

Patching and Updates

Keep systems up to date with the latest security patches and updates provided by Microsoft.