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High VDE-2021-026 12 CVEs

Weidmueller: Multiple vulnerabilities in Industrial WLAN devices

Published Jun 23, 2021 · Updated May 14, 2025 · Revision 4

Vendor: Weidmueller Product: IE-WL-BL-AP-CL-EU Product: IE-WL-BL-AP-CL-US Product: IE-WL-VL-AP-BR-CL-EU Product: IE-WL-VL-AP-BR-CL-US Product: IE-WLT-BL-AP-CL-EU Product: IE-WLT-BL-AP-CL-US Product: IE-WLT-VL-AP-BR-CL-EU Product: IE-WLT-VL-AP-BR-CL-US

Summary

Multiple issues in Weidmueller Industrial WLAN devices have been found.

Initial publication date: 2021-06-23
Update A publication date: 2021-07-02

Update A

CVE-2021-33534

CVSS: 7.2 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H)
Description: An exploitable command injection vulnerability exists in the hostname functionality of Weidmueller Industrial WLAN devices. A specially crafted entry to network configuration information can cause execution of arbitrary system commands, resulting in full control of the device. An attacker can send various requests while authenticated as a high privilege user to trigger this vulnerability.

Details

For all potential vulnerabilities, customers can download a patched firmware to secure their Industrial WLAN devices properly.

Please follow the procedure below to download and install the latest firmware for your device:

1. Use the link: [www.weidmueller.com](www.weidmueller.com)
2. Enter the product number of the Industrial WLAN device you want to update in the search field on the webpage and press "Enter".
3. On the next page, expand the drop-down menu **"Downloads"**.
4. Download the respective firmware from the download table.
5. Install the firmware on your device.

Patched firmware versions for all affected products

| Product number | Product name | Firmware version |
|---------------|-----------------------------------|------------------------------------------|
| 2536600000 | IE-WL-BL-AP-CL-EU | <= V1.16.21 (Build 21010513) |
| 2536650000 | IE-WLT-BL-AP-CL-EU | <= V1.16.21 (Build 21010513) |
| 2536660000 | IE-WL-BL-AP-CL-US | <= V1.16.21 (Build 21010513) |
| 2536670000 | IE-WLT-BL-AP-CL-US | <= V1.16.21 (Build 21010513) |
| 2536680000 | IE-WL-VL-AP-BR-CL-EU | <= V1.11.13 (Build 21010513) |
| 2536690000 | IE-WLT-VL-AP-BR-CL-EU | <= V1.11.13 (Build 21010513) |
| 2536700000 | IE-WL-VL-AP-BR-CL-US | <= V1.11.13 (Build 21010513) |
| 2536710000 | IE-WLT-VL-AP-BR-CL-US | <= V1.11.13 (Build 21010513) |

If a firmware update is available for your device, please follow the steps above to install it.

Vulnerabilities 12

  • High 8.8
    CVE-2021-33528

    WEIDMUELLER: WLAN devices affected by privilege escalation vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable privilege escalation vulnerability exists in the iw_console functionality. A specially crafted menu selection string can cause an escape from the restricted console, resulting in syste…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 8.8
    CVE-2021-33530

    WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

    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 b…

    Weidmüller IE-WL(T)-BL-AP-CL-XX IE-WL(T)-VL-AP-CL-XX
  • High 8.8
    CVE-2021-33531

    WEIDMUELLER: WLAN devices affected by Hard-coded Credentials vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable use of hard-coded credentials vulnerability exists in multiple iw_* utilities. The device operating system contains an undocumented encryption password, allowing for the creation of cu…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 8.8
    CVE-2021-33532

    WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable command injection vulnerability exists in the iw_webs functionality. A specially crafted diagnostic script file name can cause user input to be reflected in a subsequent iw_system call…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 8.8
    CVE-2021-33533

    WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

    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, resu…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 8.8
    CVE-2021-33535

    WEIDMUELLER: WLAN devices affected by exploitable format string vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in r…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 8.8
    CVE-2021-33537

    WEIDMUELLER: WLAN devices affected by Remote Code Execution (RCE) vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable remote code execution vulnerability exists in the iw_webs configuration parsing functionality. A specially crafted user name entry can cause an overflow of an error message buffer, res…

    Weidmüller IE-WL(T)-BL-AP-CL-XX IE-WL(T)-VL-AP-CL-XX
  • High 8.8
    CVE-2021-33538

    WEIDMUELLER: WLAN devices affected by improper access control vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable improper access control vulnerability exists in the iw_webs account settings functionality. A specially crafted user name entry can cause the overwrite of an existing user account pass…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 7.5
    CVE-2021-33529

    WEIDMUELLER: WLAN devices affected by Hard-coded Credentials vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions the usage of hard-coded cryptographic keys within the service agent binary allows for the decryption of captured traffic across the network from or to the device.

    Weidmüller IE-WL(T)-BL-AP-CL-XX IE-WL(T)-VL-AP-CL-XX
  • High 7.5
    CVE-2021-33536

    WEIDMUELLER: WLAN devices affected by Denial-of-Service vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable denial-of-service vulnerability exists in ServiceAgent functionality. A specially crafted packet can cause an integer underflow, triggering a large memcpy that will access unmapped or …

    Weidmüller IE-WL(T)-BL-AP-CL-XX IE-WL(T)-VL-AP-CL-XX
  • High 7.2
    CVE-2021-33534

    WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable command injection vulnerability exists in the hostname functionality. A specially crafted entry to network configuration information can cause execution of arbitrary system commands, r…

    Weidmüller IE-WL(T)-VL-AP-CL-XX IE-WL(T)-BL-AP-CL-XX
  • High 7.2
    CVE-2021-33539

    WEIDMUELLER: WLAN devices affected by authentication bypass vulnerability

    In Weidmueller Industrial WLAN devices in multiple versions an exploitable authentication bypass vulnerability exists in the hostname processing. A specially configured device hostname can cause the device to interpret selected remote traffic as local traffic…

    Weidmüller IE-WL(T)-BL-AP-CL-XX IE-WL(T)-VL-AP-CL-XX

Revision history

  1. #4

    Fix: added distribution

  2. #3

    Fix: change vendor name

  3. #2

    Update A

  4. #1

    Initial revision.

References