CVE-2020-2002 : Vulnerability Insights and Analysis

An authentication bypass by spoofing vulnerability exists in the authentication daemon and User-ID components of Palo Alto Networks PAN-OS, potentially allowing unauthorized access to the system.

Understanding CVE-2020-2002

This CVE identifies a critical security issue in PAN-OS that could be exploited by attackers to gain unauthorized access.

What is CVE-2020-2002?

This vulnerability in PAN-OS arises from a failure to verify the integrity of the Kerberos key distribution center (KDC) before authenticating users, enabling a man-in-the-middle attack scenario.

The Impact of CVE-2020-2002

The vulnerability poses a high risk, with a CVSS base score of 8.1, affecting confidentiality, integrity, and availability of the system.

Technical Details of CVE-2020-2002

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw allows attackers to bypass authentication by spoofing the Kerberos KDC, potentially leading to unauthorized access as an administrator.

Affected Systems and Versions

PAN-OS 7.1 versions earlier than 7.1.26
PAN-OS 8.1 versions earlier than 8.1.13
PAN-OS 9.0 versions earlier than 9.0.6
All versions of PAN-OS 8.0

Exploitation Mechanism

Attackers with the ability to intercept communication between PAN-OS and KDC can exploit this vulnerability to gain administrator access.

Mitigation and Prevention

Protecting systems from CVE-2020-2002 is crucial to maintaining security.

Immediate Steps to Take

Upgrade to PAN-OS 7.1.26, 8.1.13, 9.0.6, or later versions to mitigate the vulnerability.
Ensure secure communication between PAN-OS and the Kerberos server.

Long-Term Security Practices

Regularly review and update security configurations.
Implement network segmentation and access controls.

Patching and Updates

PAN-OS 8.0 is end-of-life and no longer covered by security policies.
Stay informed about security best practices and updates from Palo Alto Networks.