CVE-2019-16336 Explained : Impact and Mitigation
Learn about CVE-2019-16336, a vulnerability in Cypress PSoC 4 BLE component versions 3.61 and earlier, allowing denial of service attacks via crafted BLE Link Layer frames. Find mitigation steps and prevention measures.
A vulnerability has been identified in the implementation of Bluetooth Low Energy in the Cypress PSoC 4 BLE component versions 3.61 and earlier, allowing attackers to cause a denial of service.
Understanding CVE-2019-16336
This CVE pertains to a vulnerability in the Bluetooth Low Energy implementation in Cypress PSoC 4 BLE component versions 3.61 and earlier.
What is CVE-2019-16336?
The vulnerability is related to the processing of data channel frames with a payload length that exceeds the maximum RX payload size specified in the link layer configuration. Attackers within radio range could exploit this to cause a denial of service (crash) by sending a specially crafted BLE Link Layer frame.
The Impact of CVE-2019-16336
The vulnerability could lead to a denial of service (crash) on affected devices within the radio range of the attacker.
Technical Details of CVE-2019-16336
This section provides more technical insights into the CVE.
Vulnerability Description
The vulnerability arises from the processing of data channel frames with oversized payload lengths, allowing attackers to trigger a denial of service by sending a malicious BLE Link Layer frame.
Affected Systems and Versions
- Cypress PSoC 4 BLE component versions 3.61 and earlier
Exploitation Mechanism
Attackers within radio range can exploit the vulnerability by sending specially crafted BLE Link Layer frames with payloads that exceed the maximum RX payload size.
Mitigation and Prevention
Protecting systems from CVE-2019-16336 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Apply vendor-supplied patches or updates promptly
- Implement network segmentation to limit exposure
- Monitor network traffic for any suspicious activities
Long-Term Security Practices
- Regularly update firmware and software to patch vulnerabilities
- Conduct security assessments and penetration testing
- Educate users on safe Bluetooth usage practices
Patching and Updates
- Ensure all affected systems are updated with the latest patches from Cypress