CVE-2020-2033 : Security Advisory and Response

A vulnerability in Palo Alto Networks GlobalProtect App could allow a man-in-the-middle attacker to access the GlobalProtect Server by exploiting a missing certification validation when the pre-logon feature is enabled.

Understanding CVE-2020-2033

This CVE involves a security issue in the GlobalProtect App that could lead to unauthorized access to the server.

What is CVE-2020-2033?

When the pre-logon feature is active, a flaw in GlobalProtect App allows an attacker on the same network segment to intercept the pre-logon authentication cookie, potentially compromising security.

The Impact of CVE-2020-2033

CVSS Base Score: 5.3 (Medium Severity)
Confidentiality Impact: High
Attack Complexity: High
The vulnerability could enable unauthorized access to the GlobalProtect Server.

Technical Details of CVE-2020-2033

This section delves into the specifics of the vulnerability.

Vulnerability Description

The missing certification validation in GlobalProtect App exposes the pre-logon authentication cookie to attackers, facilitating unauthorized access to the server.

Affected Systems and Versions

GlobalProtect App 5.0 versions prior to 5.0.10
GlobalProtect App 5.1 versions prior to 5.1.4

Exploitation Mechanism

The vulnerability allows a man-in-the-middle attacker to intercept the pre-logon authentication cookie, potentially gaining access to the GlobalProtect Server.

Mitigation and Prevention

Protecting systems from this vulnerability is crucial.

Immediate Steps to Take

Decrease timeout settings for the pre-logon feature
Disable the pre-logon feature in the GlobalProtect gateway

Long-Term Security Practices

Regularly update GlobalProtect App to the latest version
Implement network segmentation and access controls

Patching and Updates

Ensure all systems are updated to GlobalProtect App 5.0.10, 5.1.4, or later versions.