CVE-2021-34149 : Exploit Details and Defense Strategies
Learn about CVE-2021-34149, a Bluetooth Classic vulnerability on Texas Instruments CC256XCQFN-EM, allowing attackers to trigger a denial of service attack by flooding the device with LMP_AU_Rand packets.
Bluetooth Classic implementation on the Texas Instruments CC256XCQFN-EM is vulnerable to a denial of service attack due to improper handling of continuous LMP_AU_Rand packets.
Understanding CVE-2021-34149
This CVE describes a vulnerability in the Bluetooth Classic implementation on a specific Texas Instruments device that can be exploited by attackers in radio range.
What is CVE-2021-34149?
The vulnerability arises from the device's inability to properly handle continuous LMP_AU_Rand packets, leading to a deadlock situation through a denial of service attack.
The Impact of CVE-2021-34149
Attackers within radio range can exploit this flaw to flood the device with LMP_AU_Rand packets after the paging procedure, triggering a denial of service condition.
Technical Details of CVE-2021-34149
This section will cover specific technical details related to the vulnerability.
Vulnerability Description
The vulnerability in the Bluetooth Classic implementation allows attackers to exploit continuous LMP_AU_Rand packets, causing a deadlock scenario through a denial of service attack.
Affected Systems and Versions
The Texas Instruments CC256XCQFN-EM device is affected by this vulnerability due to improper handling of LMP_AU_Rand packets.
Exploitation Mechanism
By flooding the vulnerable device with LMP_AU_Rand packets after the paging procedure, attackers can trigger a deadlock and initiate a denial of service attack.
Mitigation and Prevention
To protect systems from this vulnerability, immediate steps and long-term security practices are essential.
Immediate Steps to Take
Ensure devices are updated with security patches and implement additional security measures to mitigate the risk of denial of service attacks.
Long-Term Security Practices
Regularly update firmware and software to address known vulnerabilities and enhance the overall security posture of the devices.
Patching and Updates
Stay informed about security updates from Texas Instruments and apply patches promptly to prevent exploitation of this vulnerability.