Zyxel.Firewall.ZTP.Command.Injection

Description

This indicates an attack attempt to exploit a Command Injection Vulnerability in Zyxel firewalls.
The vulnerability is due to insufficient sanitizing of user supplied inputs in the application. An unauthenticated remote attacker may be able to exploit this to execute arbitrary commands within the context of the application.

Outbreak Alert

Zerobot is a Go-based botnet that spreads primarily through IoT and web application vulnerabilities. According to Fortinet research analysis the most recent distribution of Zerobot includes additional capabilities such a new DDoS attack capabilities and exploiting Apache vulnerabilities.

View the full Outbreak Alert Report

Affected Products

USG FLEX 100(W), 200, 500, 700 ZLD V5.00 through ZLD V5.21 Patch 1
USG FLEX 50(W) / USG20(W)-VPN ZLD V5.10 through ZLD V5.21 Patch 1
ATP series ZLD V5.10 through ZLD V5.21 Patch 1
VPN series ZLD V4.60 through ZLD V5.21 Patch 1

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the latest update from the vendor.
https://www.zyxel.com/support/Zyxel-security-advisory-for-OS-command-injection-vulnerability-of-firewalls.shtml