CVE-2021-36199 : Exploit Details and Defense Strategies
Learn about CVE-2021-36199, a medium-severity vulnerability in VideoEdge NVR systems by Johnson Controls, impacting versions 5.4.1 to 5.7.1. Find out the impact, affected systems, and mitigation steps.
A vulnerability in VideoEdge NVRs can be exploited by running a vulnerability scanner, impacting the system's functionality.
Understanding CVE-2021-36199
This CVE involves an improper handling vulnerability in the Johnson Controls' VideoEdge product.
What is CVE-2021-36199?
The vulnerability allows attackers to disrupt system functionality by scanning the VideoEdge NVRs.
The Impact of CVE-2021-36199
The impact is rated as MEDIUM with a CVSS base score of 5.3. The attack complexity is low, and the privilege required for exploitation is none.
Technical Details of CVE-2021-36199
This vulnerability is due to the improper handling of syntactically invalid structures in the affected versions of VideoEdge.
Vulnerability Description
Running a vulnerability scanner against VideoEdge NVRs can cause some functionality to stop.
Affected Systems and Versions
Johnson Controls' VideoEdge versions 5.4.1 to 5.7.1 are affected by this vulnerability.
Exploitation Mechanism
Attackers can exploit this vulnerability by scanning the VideoEdge NVRs over the network, causing disruptions.
Mitigation and Prevention
To mitigate the CVE-2021-36199 vulnerability:
Immediate Steps to Take
Update VideoEdge with the provided hotfix for versions 5.4.1 to 5.7.1 or upgrade to version 5.9 to address the security issue.
Long-Term Security Practices
Regularly update and patch all software and firmware to prevent vulnerabilities like this from being exploited.
Patching and Updates
Stay informed about security advisories from Johnson Controls to apply patches promptly.