cisco-sa-wlc-auth-bypass-JRNhV4fF: Cisco Wireless LAN Controller Management Interface Authentication Bypass Vulnerability
First published: Wed Apr 13 2022(Updated: )
A vulnerability in the authentication functionality of Cisco Wireless LAN Controller (WLC) Software could allow an unauthenticated, remote attacker to bypass authentication controls and log in to the device through the management interface This vulnerability is due to the improper implementation of the password validation algorithm. An attacker could exploit this vulnerability by logging in to an affected device with crafted credentials. A successful exploit could allow the attacker to bypass authentication and log in to the device as an administrator. The attacker could obtain privileges that are the same level as an administrative user but it depends on the crafted credentials. Note: This vulnerability exists because of a non-default device configuration that must be present for it to be exploitable. For details about the vulnerable configuration, see the Vulnerable Products section of this advisory. Cisco has released software updates that address this vulnerability. There are workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-wlc-auth-bypass-JRNhV4fF
Credit: a security researcher with Bispok.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Wireless LAN Controller | =8.10.151.0 and later<8.10.171.0 | 8.10.171.0 |
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Reference Links
Frequently Asked Questions
What is Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF)?
Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF) is a vulnerability in the authentication functionality of Cisco Wireless LAN Controller (WLC) Software that allows an unauthenticated attacker to bypass authentication controls and log in to the device through the management interface.
How severe is Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF)?
Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF) has a severity rating of critical with a severity value of 10.
Which software versions are affected by Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF)?
Cisco Wireless LAN Controller (WLC) Software versions 8.10.151.0 and later, up to but excluding 8.10.171.0 are affected by Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF).
How can an attacker exploit Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF)?
An attacker can exploit Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF) by sending crafted requests to the management interface and bypassing the authentication controls.
Is there a fix available for Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF)?
Yes, there is a fix available for Cisco SA WLC Authentication Bypass (cisco-sa-wlc-auth-bypass-JRNhV4fF). Cisco recommends upgrading to version 8.10.171.0 of Cisco Wireless LAN Controller (WLC) Software.
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