CVE-2021-33530 WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

High 8.8 Published 25 Jun 2021 Updated 17 Sep 2024

Authenticated low-privilege users can execute arbitrary commands via crafted diagnostic scripts, enabling remote control of Weidmüller industrial WLAN devices.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-33530?

CVE-2021-33530 is a high-severity command injection vulnerability in Weidmüller IE-WL(T)-BL-AP-CL-XX, published on 25 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

In Weidmueller Industrial WLAN devices in multiple versions an exploitable command injection vulnerability exists in encrypted diagnostic script functionality of the devices. A specially crafted diagnostic script file can cause arbitrary busybox commands to be executed, resulting in remote control over the device. An attacker can send diagnostic while authenticated as a low privilege user to trigger this vulnerability.

Weakness: CWE-78

Which versions are affected by CVE-2021-33530?

It affects 8 products.

Products include Weidmueller Ie-Wl-Bl-Ap-Cl-Eu Firmware, Weidmueller Ie-Wl-Bl-Ap-Cl-Us Firmware, Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Eu Firmware, Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Us Firmware, Weidmueller Ie-Wlt-Bl-Ap-Cl-Eu Firmware, Weidmueller Ie-Wlt-Bl-Ap-Cl-Us Firmware and 2 more.

How do I fix CVE-2021-33530?

No fix has been published for CVE-2021-33530 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-2021-33530 being exploited?

There is no known exploitation of CVE-2021-33530 in the wild and no public exploit code.

Sources

Also known as GHSA-r496-ccr2-pqhh.