CVE-2020-29299 : Exploit Details and Defense Strategies
Learn about CVE-2020-29299, a critical command injection vulnerability in Zyxel products allowing unauthorized command execution. Find out affected systems, exploitation risks, and mitigation steps.
Certain Zyxel products are vulnerable to command injection, allowing an admin to execute commands via an input string during a password-change action. This impacts various Zyxel products including VPN On-premise, VPN Orchestrator, USG, USG FLEX, ATP, and NSG.
Understanding CVE-2020-29299
This CVE identifies a critical vulnerability in Zyxel products that enables unauthorized command execution by an admin.
What is CVE-2020-29299?
The vulnerability in Zyxel products allows an admin to inject commands through the input string during a password change, leading to potential unauthorized access and control.
The Impact of CVE-2020-29299
The exploitation of this vulnerability can result in severe consequences, including unauthorized access to sensitive information, system compromise, and potential data breaches.
Technical Details of CVE-2020-29299
Zyxel products are susceptible to command injection due to improper input validation.
Vulnerability Description
The vulnerability allows an admin to execute commands through the input string to chg_exp_pwd during a password-change action.
Affected Systems and Versions
- VPN On-premise before ZLD V4.39 week38
- VPN Orchestrator before SD-OS V10.03 week32
- USG before ZLD V4.39 week38
- USG FLEX before ZLD V4.55 week38
- ATP before ZLD V4.55 week38
- NSG before 1.33 patch 4
Exploitation Mechanism
An attacker can exploit this vulnerability by crafting a malicious input string during a password-change action, allowing the execution of unauthorized commands.
Mitigation and Prevention
It is crucial to take immediate steps to mitigate the risks posed by CVE-2020-29299.
Immediate Steps to Take
- Update Zyxel products to the latest patched versions that address the command injection vulnerability.
- Monitor network traffic for any suspicious activities that may indicate exploitation of the vulnerability.
- Implement strong password policies and multi-factor authentication to enhance security.
Long-Term Security Practices
- Regularly conduct security assessments and penetration testing to identify and address vulnerabilities proactively.
- Educate system administrators and users about the risks of command injection and best practices for secure password management.
Patching and Updates
- Stay informed about security advisories from Zyxel and promptly apply patches and updates to ensure the protection of your systems and data.