CVE-2019-10633 : Security Advisory and Response

A vulnerability in the Python web server routing found in the Zyxel NAS 326 version 5.21 and earlier allows a remote attacker, who has authenticated access, to execute unauthorized code by exploiting the eval injection flaw in the tjp6jp6y4, simZysh, and ck6fup6 APIs.

Understanding CVE-2019-10633

This CVE identifies an eval injection vulnerability in the Python web server routing on the Zyxel NAS 326 version 5.21 and below, enabling a remote authenticated attacker to execute arbitrary code via specific APIs.

What is CVE-2019-10633?

The vulnerability in the Python web server routing on Zyxel NAS 326 version 5.21 and earlier allows a remote authenticated attacker to execute unauthorized code through specific APIs.

The Impact of CVE-2019-10633

Attackers with authenticated access can execute unauthorized code on the affected system.

Technical Details of CVE-2019-10633

This section provides technical details about the vulnerability.

Vulnerability Description

The vulnerability allows remote authenticated attackers to execute arbitrary code through the tjp6jp6y4, simZysh, and ck6fup6 APIs.

Affected Systems and Versions

Zyxel NAS 326 version 5.21 and earlier

Exploitation Mechanism

Attackers exploit the eval injection flaw in the mentioned APIs to execute unauthorized code.

Mitigation and Prevention

Protecting systems from CVE-2019-10633 is crucial to prevent unauthorized code execution.

Immediate Steps to Take

Update Zyxel NAS 326 to a patched version that addresses the eval injection vulnerability.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Implement strong authentication mechanisms to prevent unauthorized access.
Regularly audit and update system components to address vulnerabilities.

Patching and Updates

Apply security patches provided by Zyxel to fix the vulnerability.