CVE-2020-2020 : What You Need to Know

Cortex XDR Agent: Exceptional condition denial-of-service (DoS)

Understanding CVE-2020-2020

An improper handling of exceptional conditions vulnerability in Cortex XDR Agent allows a local authenticated Windows user to create files in the software's internal program directory, leading to a denial-of-service condition.

What is CVE-2020-2020?

This vulnerability in Cortex XDR Agent enables a local authenticated Windows user to create files that prevent the software from starting, causing a denial-of-service situation that persists even after software or machine restarts.

The Impact of CVE-2020-2020

CVSS Base Score: 5.5 (Medium Severity)
Attack Vector: Local
Attack Complexity: Low
Availability Impact: High
Privileges Required: Low

Technical Details of CVE-2020-2020

Vulnerability Description

The vulnerability arises from improper handling of exceptional conditions in Cortex XDR Agent, allowing the creation of files that hinder the software's startup.

Affected Systems and Versions

Cortex XDR Agent 5.0 versions earlier than 5.0.10
Cortex XDR Agent 6.1 versions earlier than 6.1.7
Cortex XDR Agent 7.0 versions earlier than 7.0.3
Cortex XDR Agent 7.1 versions earlier than 7.1.2

Exploitation Mechanism

The vulnerability can be exploited by a local authenticated Windows user to disrupt the startup of Cortex XDR Agent by creating specific files in the program directory.

Mitigation and Prevention

Immediate Steps to Take

Update Cortex XDR Agent to versions 5.0.10, 6.1.7, 7.0.3, 7.1.2, or later to mitigate the vulnerability.
Monitor for any unusual file creation in the software's internal directory.

Long-Term Security Practices

Regularly review and update security configurations to prevent unauthorized file creation.
Implement least privilege access controls to limit the impact of potential vulnerabilities.

Patching and Updates

Ensure timely installation of security patches and updates provided by Palo Alto Networks for Cortex XDR Agent.