CVE-2020-1099 : Exploit Details and Defense Strategies

A cross-site-scripting (XSS) vulnerability in Microsoft SharePoint Server could allow spoofing attacks, affecting versions 2016 and 2019.

Understanding CVE-2020-1099

This CVE involves a security vulnerability in Microsoft SharePoint Server that could be exploited for cross-site-scripting attacks.

What is CVE-2020-1099?

A cross-site-scripting (XSS) vulnerability in Microsoft SharePoint Server allows specially crafted web requests to bypass sanitization.
Known as 'Microsoft Office SharePoint XSS Vulnerability'.
Unique from CVE-2020-1100, CVE-2020-1101, and CVE-2020-1106.

The Impact of CVE-2020-1099

Spoofing attacks could be carried out due to improper sanitization of web requests.

Technical Details of CVE-2020-1099

This section delves into the vulnerability's description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

MS SharePoint Server fails to properly sanitize crafted web requests, exposing XSS vulnerability.

Affected Systems and Versions

Microsoft SharePoint Enterprise Server 2016
Microsoft SharePoint Server 2019

Exploitation Mechanism

Attackers can inject malicious scripts via specially crafted web requests, enabling XSS attacks.

Mitigation and Prevention

Guidelines and steps to secure systems and prevent exploitation.

Immediate Steps to Take

Apply security updates provided by Microsoft promptly.
Implement web request sanitization and input validation protocols.
Monitor and restrict user input to prevent XSS attacks.

Long-Term Security Practices

Conduct regular security assessments and audits.
Train staff on secure coding practices to mitigate XSS vulnerabilities.

Patching and Updates

Keep Microsoft SharePoint servers updated with the latest security patches to address this vulnerability.