CVE-2019-1273 : Security Advisory and Response

Active Directory Federation Services (ADFS) is vulnerable to a cross-site scripting (XSS) flaw due to inadequate error message sanitization.

Understanding CVE-2019-1273

What is CVE-2019-1273?

The vulnerability in ADFS allows for cross-site scripting attacks by not properly sanitizing specific error messages.

The Impact of CVE-2019-1273

This vulnerability could be exploited by attackers to execute malicious scripts in the context of the user's browser, potentially leading to unauthorized actions.

Technical Details of CVE-2019-1273

Vulnerability Description

ADFS is prone to a cross-site scripting (XSS) vulnerability due to insufficient error message sanitization.

Affected Systems and Versions

Windows 10 Version 1803, 1809 for 32-bit, x64-based, and ARM64-based Systems
Windows Server versions 1803, 2019, and 2019 (Core installation)
Windows 10 Version 1903 for 32-bit, x64-based, and ARM64-based Systems
Windows Server version 1903 (Server Core installation)

Exploitation Mechanism

Attackers can inject and execute malicious scripts through crafted error messages in ADFS, potentially compromising user data.

Mitigation and Prevention

Immediate Steps to Take

Apply the necessary security updates provided by Microsoft to address the vulnerability.
Monitor and restrict access to ADFS to prevent unauthorized exploitation.

Long-Term Security Practices

Regularly review and update security configurations for ADFS to mitigate future vulnerabilities.

Patching and Updates

Install the latest security patches and updates from Microsoft to safeguard ADFS against known vulnerabilities.