CVE-2021-33533 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 on Weidmüller Industrial WLAN devices via the iw_serverip parameter.

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-2021-33533?

CVE-2021-33533 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 the iw_webs functionality. A specially crafted iw_serverip parameter can cause user input to be reflected in a subsequent iw_system call, resulting in remote control over the device. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

Weakness: CWE-78

Which versions are affected by CVE-2021-33533?

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-2021-33533?

No fix has been published for CVE-2021-33533 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-2021-33533 being exploited?

There is no known exploitation of CVE-2021-33533 in the wild and no public exploit code.

Sources

Also known as GHSA-6g5w-7qx6-q4pr.