CVE-2019-6496 Explained : Impact and Mitigation
Learn about CVE-2019-6496 affecting Marvell Avastar Wi-Fi devices. Remote attackers can execute unauthorized code or disrupt devices through malformed Wi-Fi packets. Find mitigation steps and prevention measures.
Marvell Avastar Wi-Fi devices, including models 88W8787, 88W8797, 88W8801, 88W8897, and 88W8997, are vulnerable to remote attacks due to the ThreadX-based firmware. This vulnerability allows attackers to execute unauthorized code or disrupt the devices by sending malformed Wi-Fi packets during the process of identifying available Wi-Fi networks. Exploitation of the Wi-Fi device may also lead to the exploitation of the host application processor under certain conditions.
Understanding CVE-2019-6496
This CVE involves a critical vulnerability in Marvell Avastar Wi-Fi devices that can be exploited remotely.
What is CVE-2019-6496?
The vulnerability in Marvell Avastar Wi-Fi devices allows remote attackers to execute arbitrary code or cause a denial of service by sending malformed Wi-Fi packets during network identification.
The Impact of CVE-2019-6496
- Attackers can execute unauthorized code on affected devices
- Disruption of devices through malformed Wi-Fi packets
- Potential exploitation of the host application processor
Technical Details of CVE-2019-6496
Marvell Avastar Wi-Fi devices are susceptible to remote attacks due to a firmware vulnerability.
Vulnerability Description
- ThreadX-based firmware vulnerability
- Allows remote execution of arbitrary code
- Possibility of denial of service through Wi-Fi packet manipulation
Affected Systems and Versions
- Models 88W8787, 88W8797, 88W8801, 88W8897, 88W8997
- ThreadX-based firmware
Exploitation Mechanism
- Attackers exploit the vulnerability by sending malformed Wi-Fi packets
- Potential for unauthorized code execution or device disruption
- Host application processor exploitation under specific conditions
Mitigation and Prevention
Immediate Steps to Take:
- Apply patches and updates from the device manufacturer
- Implement network segmentation to limit exposure
- Monitor network traffic for any suspicious activities
Long-Term Security Practices:
- Regularly update firmware and software
- Conduct security assessments and penetration testing
- Educate users on safe Wi-Fi practices
Patching and Updates:
- Check for firmware updates from Marvell or device vendors
- Apply patches promptly to mitigate the vulnerability