CVE-2021-45809 : Exploit Details and Defense Strategies

GlobalProtect-openconnect versions prior to 1.4.3 are affected by incorrect access control in GPService through DBUS and GUI Application. This vulnerability allows arbitrary users to execute commands as root.

Understanding CVE-2021-45809

What is CVE-2021-45809?

GlobalProtect-openconnect versions before 1.4.3 have an access control issue in GPService through DBUS and the GUI Application, enabling unauthorized users to run commands as root.

The Impact of CVE-2021-45809

This vulnerability may result in unauthorized users executing commands with elevated privileges, potentially leading to system compromise or data breaches.

Technical Details of CVE-2021-45809

Vulnerability Description

The vulnerability in GlobalProtect-openconnect allows arbitrary users to execute commands as root using the

--script=<script>

parameter due to incorrect access control in GPService.

Affected Systems and Versions

Product: GlobalProtect-openconnect
Versions affected: Prior to 1.4.3

Exploitation Mechanism

The vulnerability can be exploited by submitting specific parameters that bypass access control mechanisms, enabling unauthorized users to escalate privileges.

Mitigation and Prevention

Immediate Steps to Take

Upgrade to version 1.4.3 or newer to mitigate the vulnerability
Monitor for any unusual activity indicating potential exploitation of the issue

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities
Implement least privilege access and robust authentication mechanisms

Patching and Updates

Apply patches and updates provided by the vendor to address the access control vulnerability