CVE-2021-33528 : Security Advisory and Response
Discover the details of CVE-2021-33528 affecting Weidmuller Industrial WLAN devices. Learn about the privilege escalation vulnerability, its impact, affected systems, and mitigation steps.
In Weidmueller Industrial WLAN devices, multiple versions are affected by a privilege escalation vulnerability. This vulnerability exists in the iw_console functionality and can allow an attacker to gain system access as the root user by escaping from the restricted console.
Understanding CVE-2021-33528
This CVE involves a privilege escalation vulnerability in Weidmueller Industrial WLAN devices, impacting multiple versions.
What is CVE-2021-33528?
The vulnerability allows an attacker to execute commands as the root user by exploiting the iw_console functionality through a specially crafted menu selection string.
The Impact of CVE-2021-33528
The impact of this vulnerability is rated as high with a CVSS base score of 8.8. It has high impacts on confidentiality, integrity, and availability of the affected systems.
Technical Details of CVE-2021-33528
This section covers the specifics of the vulnerability.
Vulnerability Description
The vulnerability in Weidmueller Industrial WLAN devices allows privilege escalation via crafted menu selection strings, leading to unauthorized system access.
Affected Systems and Versions
Affected products include IE-WL(T)-BL-AP-CL-XX and IE-WL(T)-VL-AP-CL-XX with specific versions mentioned in the data.
Exploitation Mechanism
An attacker can exploit this vulnerability by sending commands as a low privilege user, which triggers the escape from the restricted console.
Mitigation and Prevention
To address CVE-2021-33528, the following steps can be taken.
Immediate Steps to Take
Ensure immediate patching by updating affected versions to V1.16.21 (Build 21010513) or higher for IE-WL(T)-BL-AP-CL-XX and V1.11.13 (Build 21010513) or higher for IE-WL(T)-VL-AP-CL-XX.
Long-Term Security Practices
Implement robust security protocols and regular vulnerability assessments to prevent similar exploits in the future.
Patching and Updates
Regularly check for updates and apply patches provided by Weidmueller to maintain the security of Industrial WLAN devices.