critical
9
CWE
78 77
Advisory Published
Updated

CVE-2021-33533: WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

First published: Wed Jun 23 2021(Updated: )

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.

Credit: info@cert.vde.com

Affected SoftwareAffected VersionHow to fix
Weidmueller Ie-wl-bl-ap-cl-eu Firmware<=1.16.18
Weidmueller Ie-wl-bl-ap-cl-eu
Weidmueller Ie-wlt-bl-ap-cl-eu Firmware<=1.16.18
Weidmueller Ie-wlt-bl-ap-cl-eu
Weidmueller Ie-wl-bl-ap-cl-us Firmware<=1.16.18
Weidmueller Ie-wl-bl-ap-cl-us
Weidmueller Ie-wlt-bl-ap-cl-us Firmware<=1.16.18
Weidmueller Ie-wlt-bl-ap-cl-us
Weidmueller Ie-wl-vl-ap-br-cl-eu Firmware<=1.16.18
Weidmueller Ie-wl-vl-ap-br-cl-eu
Weidmueller Ie-wlt-vl-ap-br-cl-eu Firmware<=1.16.18
Weidmueller Ie-wlt-vl-ap-br-cl-eu
Weidmueller Ie-wl-vl-ap-br-cl-us Firmware<=1.16.18
Weidmueller Ie-wl-vl-ap-br-cl-us
Weidmueller Ie-wlt-vl-ap-br-cl-us Firmware<=1.16.18
Weidmueller Ie-wlt-vl-ap-br-cl-us
Weidmueller Ie-wl-bl-ap-cl-eu Firmware<=1.11.10
Weidmueller Ie-wlt-bl-ap-cl-eu Firmware<=1.11.10
Weidmueller Ie-wl-bl-ap-cl-us Firmware<=1.11.10
Weidmueller Ie-wlt-bl-ap-cl-us Firmware<=1.11.10
Weidmueller Ie-wl-vl-ap-br-cl-eu Firmware<=1.11.10
Weidmueller Ie-wlt-vl-ap-br-cl-eu Firmware<=1.11.10
Weidmueller Ie-wl-vl-ap-br-cl-us Firmware<=1.11.10
Weidmueller Ie-wlt-vl-ap-br-cl-us Firmware<=1.11.10

Remedy

For IE-WL(T)-BL-AP-CL-XX versions V1.16.21 (Build 21010513) and greater are fixed. For IE-WL(T)-VL-AP-CL-XX versions V1.11.13 (Build 21010513) and greater are fixed.

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-33533?

    CVE-2021-33533 is a command injection vulnerability in Weidmueller Industrial WLAN devices.

  • What is the severity of CVE-2021-33533?

    CVE-2021-33533 has a severity rating of critical with a value of 8.8.

  • Which software versions are affected by CVE-2021-33533?

    The affected software versions for CVE-2021-33533 are: Weidmueller Ie-wl-bl-ap-cl-eu Firmware up to version 1.16.18, Weidmueller Ie-wlt-bl-ap-cl-eu Firmware up to version 1.16.18, Weidmueller Ie-wl-bl-ap-cl-us Firmware up to version 1.16.18, Weidmueller Ie-wlt-bl-ap-cl-us Firmware up to version 1.16.18, Weidmueller Ie-wl-vl-ap-br-cl-eu Firmware up to version 1.16.18, Weidmueller Ie-wlt-vl-ap-br-cl-eu Firmware up to version 1.16.18, Weidmueller Ie-wl-vl-ap-br-cl-us Firmware up to version 1.16.18, Weidmueller Ie-wlt-vl-ap-br-cl-us Firmware up to version 1.16.18, Weidmueller Ie-wl-bl-ap-cl-eu Firmware up to version 1.11.10, Weidmueller Ie-wlt-bl-ap-cl-eu Firmware up to version 1.11.10, Weidmueller Ie-wl-bl-ap-cl-us Firmware up to version 1.11.10, Weidmueller Ie-wlt-bl-ap-cl-us Firmware up to version 1.11.10, Weidmueller Ie-wl-vl-ap-br-cl-eu Firmware up to version 1.11.10, Weidmueller Ie-wlt-vl-ap-br-cl-eu Firmware up to version 1.11.10, Weidmueller Ie-wl-vl-ap-br-cl-us Firmware up to version 1.11.10, Weidmueller Ie-wlt-vl-ap-br-cl-us Firmware up to version 1.11.10.

  • How does the command injection vulnerability in Weidmueller Industrial WLAN devices work?

    The command injection vulnerability in Weidmueller Industrial WLAN devices occurs when a specially crafted iw_serverip parameter is used in the iw_webs functionality, allowing user input to be reflected in a subsequent iw_system call and resulting in remote control over the device.

  • What can an attacker do with the command injection vulnerability in Weidmueller Industrial WLAN devices?

    With the command injection vulnerability in Weidmueller Industrial WLAN devices, an attacker can gain remote control over the device.

  • Is there a fix for CVE-2021-33533?

    Currently, there is no information available about a fix for CVE-2021-33533. It is recommended to follow the recommendations provided by the vendor and apply any necessary updates or patches when they become available.

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