CVE-2020-1055 : What You Need to Know

A cross-site-scripting (XSS) vulnerability exists in Microsoft Active Directory Federation Services (ADFS).

Understanding CVE-2020-1055

What is CVE-2020-1055?

This vulnerability occurs when ADFS fails to properly sanitize user inputs, leading to a cross-site-scripting risk.

The Impact of CVE-2020-1055

This vulnerability can allow attackers to execute malicious scripts in the context of the user's session on the vulnerable application.

Technical Details of CVE-2020-1055

Vulnerability Description

The XSS vulnerability in Microsoft ADFS allows threat actors to inject and execute script code in user sessions.

Affected Systems and Versions

Windows 10 Version 1809 for 32-bit Systems, x64-based Systems, and ARM64-based Systems
Windows Server 2019 and 2019 Core installation
Windows 10 Version 1909 for all architectures
Windows Server Version 1909 Core installation
Windows 10 Version 1903 for all systems
Windows Server Version 1903 Core installation

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts through user-controllable inputs, such as web forms or URLs.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security updates provided by Microsoft.
Implement input validation mechanisms to sanitize user inputs.
Monitor and restrict user inputs to prevent unauthorized script execution.

Long-Term Security Practices

Regularly review and update security policies and mechanisms.
Conduct security training for developers to raise awareness about secure coding practices.

Patching and Updates

It is crucial to keep all systems and software up to date with the latest security patches to mitigate the risk of XSS attacks.