CVE-2023-28767 Command injection in ATP series firmware

High 8.8 Published 17 Jul 2023 Updated 7 Nov 2024

An unauthenticated LAN attacker can inject OS commands into Zyxel firewall configuration data when cloud management is enabled, leading to code execution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-28767?

CVE-2023-28767 is a high-severity command injection vulnerability in Zyxel ATP series firmware, published on 17 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The configuration parser fails to sanitize user-controlled input in the Zyxel ATP series firmware versions 5.10 through 5.36, USG FLEX series firmware versions 5.00 through 5.36, USG FLEX 50(W) series firmware versions 5.10 through 5.36,

USG20(W)-VPN series firmware versions 5.10 through 5.36, and VPN series firmware versions 5.00 through 5.36. An unauthenticated, LAN-based attacker could leverage the vulnerability to inject some operating system (OS) commands into the device configuration data on an affected device when the cloud management mode is enabled.

Weakness: CWE-78

Which versions are affected by CVE-2023-28767?

It affects 22 products.

Products include Zyxel Usg 20w-Vpn Firmware, Zyxel Usg 2200-Vpn Firmware, Zyxel Usg Flex 100 Firmware, Zyxel Usg Flex 100w Firmware, Zyxel Usg Flex 200 Firmware, Zyxel Usg Flex 500 Firmware and 16 more.

How do I fix CVE-2023-28767?

No fix has been published for CVE-2023-28767 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2023-28767 being exploited?

There is no known exploitation of CVE-2023-28767 in the wild and no public exploit code.

Sources

Also known as GHSA-6hq2-q59r-h45h.