CVE-2020-27891 Explained : Impact and Mitigation
Discover the impact of CVE-2020-27891, a vulnerability in Zigbee protocol on Texas Instruments CC2538 devices with Z-Stack 3.0.1. Learn about affected systems, exploitation, and mitigation steps.
This CVE-2020-27891 article provides insights into a vulnerability in the Zigbee protocol implementation on Texas Instruments CC2538 devices with Z-Stack 3.0.1.
Understanding CVE-2020-27891
This section delves into the details of the CVE-2020-27891 vulnerability.
What is CVE-2020-27891?
The Zigbee protocol implementation on Texas Instruments CC2538 devices with Z-Stack 3.0.1 fails to properly handle a ZCL Read Reporting Configuration Response message, leading to a crash in zclHandleExternal().
The Impact of CVE-2020-27891
The vulnerability can be exploited to cause a denial of service (DoS) condition on affected devices, potentially disrupting their normal operation.
Technical Details of CVE-2020-27891
This section provides technical specifics of the CVE-2020-27891 vulnerability.
Vulnerability Description
The issue arises from the improper processing of a specific message, resulting in a crash within the zclHandleExternal() function.
Affected Systems and Versions
- Texas Instruments CC2538 devices
- Z-Stack 3.0.1
Exploitation Mechanism
Attackers can exploit this vulnerability by sending a crafted ZCL Read Reporting Configuration Response message to the affected device, triggering the crash.
Mitigation and Prevention
Learn how to mitigate and prevent the CVE-2020-27891 vulnerability.
Immediate Steps to Take
- Apply vendor-supplied patches or updates to address the vulnerability.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update firmware and software to ensure the latest security fixes are in place.
- Conduct security assessments and penetration testing to identify and address vulnerabilities proactively.
- Educate users and administrators about safe practices to enhance overall security posture.
Patching and Updates
- Texas Instruments may release patches or updates to fix the vulnerability. Stay informed about these releases and apply them promptly.