CVE-2022-20769 is a high-severity vulnerability in the authentication functionality of the Cisco Wireless LAN Controller (WLC) AireOS Software. This vulnerability allows an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. It stems from insufficient error validation, enabling attackers to exploit the vulnerability by sending crafted packets to the device.
A successful exploit could lead to a crash of the wireless LAN controller, resulting in a DoS condition. Importantly, this vulnerability only affects devices operating in Federal Information Processing Standards (FIPS) mode. Given its potential impact, organizations should prioritize addressing this vulnerability.
The CVSS score for this vulnerability is 7.4, classified as high severity, indicating a significant risk to organizational operations. The urgency to patch is high due to the potential for attackers to disrupt network services.
Currently, there is no public exploit available, and the vulnerability is not listed in the Known Exploited Vulnerabilities (KEV) catalog; however, the exploitability score remains concerning.
Organizations using affected Cisco Wireless LAN Controllers should take immediate measures to update their software to the patched versions to mitigate the risk of exploitation.
Vulnerability Details
This vulnerability allows an attacker to exploit a flaw in the authentication functionality of Cisco Wireless LAN Controller AireOS Software. The vulnerability, identified as CWE-787, relates to improper control of a resource through its lifetime, leading to a denial of service.
Cisco has reported this vulnerability with a CVSS score of 7.4 under version 3.1. It is classified as high severity due to its potential to cause significant disruption. The vulnerability affects all versions of the Cisco Wireless LAN Controller software prior to 8.10.171.0.
Technical Analysis
The root cause of CVE-2022-20769 is attributed to insufficient error validation in the authentication process. Attackers on the adjacent network can leverage this flaw by sending specifically crafted packets to the controller, triggering a crash. The attack complexity is low, requiring no special privileges or user interaction to execute.
The impact of a successful attack includes a complete denial of service, affecting the availability of wireless services managed by the controller. Confidentiality and integrity impacts are rated as none, as the vulnerability does not expose sensitive information or alter data.
Risk & Impact Analysis
Risk to organizations includes potential service interruptions that can affect business operations, especially in environments relying on Cisco Wireless LAN Controllers for connectivity. The DoS condition could lead to significant downtime, affecting productivity and user satisfaction.
Given the CVSS score of 7.4 and the fact that it can be exploited by an adjacent attacker without authentication, organizations must treat this vulnerability with high urgency. Immediate patching is recommended to mitigate exposure.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of Cisco Wireless LAN Controller software prior to version 8.10.171.0 are affected by this vulnerability. Organizations should review their configurations and apply necessary updates as soon as possible.
Mitigation & Remediation
Organizations should implement the available patches for Cisco Wireless LAN Controller software immediately to mitigate this vulnerability. If a patch is unavailable, consider disabling FIPS mode if feasible, as this vulnerability only affects devices with FIPS mode enabled.
For additional security, organizations may consider deploying network controls to limit access to the LAN controller and enhance monitoring for unusual network traffic. Continuous monitoring for compliance with security best practices is also recommended.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for unusual patterns, including excessive error messages or unexpected crashes of the Wireless LAN Controller. Additionally, network signatures for known attack patterns might be useful.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2022-20769 lies in its demonstration of how insufficient error handling can lead to critical availability issues in network devices. Security teams should take this as a lesson to prioritize robust error validation in their systems.
The trend of vulnerabilities affecting network availability is growing, highlighting the need for proactive security measures. Organizations should continuously assess their security postures against emerging threats.
For further insights on security best practices, organizations can refer to resources on penetration testing and mitigate risks effectively.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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