CVE-2017-11121 Explained : Impact and Mitigation
Learn about CVE-2017-11121, a vulnerability in Broadcom BCM4355C0 Wi-Fi chips that can lead to denial of service. Find out how to mitigate and prevent potential exploits.
CVE-2017-11121, also known as B-V2017061205, involves vulnerabilities in Broadcom BCM4355C0 Wi-Fi chips that can be exploited by specially designed over-the-air Fast Transition frames. These vulnerabilities can lead to denial of service and other undesired consequences.
Understanding CVE-2017-11121
This CVE entry details a specific vulnerability in Broadcom Wi-Fi chips that can be triggered by malicious over-the-air frames.
What is CVE-2017-11121?
The CVE-2017-11121 vulnerability allows for heap or stack overflows in the internal Wi-Fi firmware of Broadcom BCM4355C0 Wi-Fi chips, potentially resulting in denial of service or other adverse effects.
The Impact of CVE-2017-11121
Exploiting this vulnerability can lead to serious consequences, including service disruptions and potential security breaches on affected devices.
Technical Details of CVE-2017-11121
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
Malicious over-the-air Fast Transition frames can exploit vulnerabilities in Broadcom BCM4355C0 Wi-Fi chips, such as versions 9.44.78.27.0.1.56 and others, causing heap or stack overflows in the internal Wi-Fi firmware.
Affected Systems and Versions
- Broadcom BCM4355C0 Wi-Fi chips, including version 9.44.78.27.0.1.56 and potentially other versions
Exploitation Mechanism
The vulnerability is triggered by specially crafted over-the-air Fast Transition frames that can manipulate the Wi-Fi firmware, leading to overflows and subsequent service disruptions.
Mitigation and Prevention
Protecting systems from CVE-2017-11121 requires immediate actions and long-term security measures.
Immediate Steps to Take
- Apply relevant security patches provided by the vendor
- Monitor network traffic for any suspicious activity related to Wi-Fi communications
Long-Term Security Practices
- Regularly update firmware and software to address known vulnerabilities
- Implement network segmentation to contain potential attacks
Patching and Updates
- Check for firmware updates from Broadcom or device manufacturers to address the CVE-2017-11121 vulnerability