CVE-2019-9502 : Vulnerability Insights and Analysis

The Broadcom wl WiFi driver has a security issue where a heap buffer overflow can occur, potentially allowing remote attackers to execute arbitrary code on affected systems.

Understanding CVE-2019-9502

This CVE involves a vulnerability in the Broadcom wl WiFi driver that can lead to denial-of-service or arbitrary code execution.

What is CVE-2019-9502?

The Broadcom wl WiFi driver is susceptible to a heap buffer overflow triggered by excessive vendor information element data length, potentially exploited by sending crafted WiFi packets.

The Impact of CVE-2019-9502

High Severity: CVSS base score of 7.9 with high impacts on confidentiality, integrity, and availability.
Attack Vector: Adjacent network, no privileges required, user interaction required.

Technical Details of CVE-2019-9502

The technical aspects of the vulnerability in the Broadcom wl driver.

Vulnerability Description

The vulnerability is a heap buffer overflow in the wlc_wpa_plumb_gtk function due to excessive vendor information element data.

Affected Systems and Versions

Affected Product: WiFi drivers
Vendor: Broadcom
Affected Version: wl

Exploitation Mechanism

Attackers can exploit the vulnerability by sending specially-crafted WiFi packets to trigger the heap buffer overflow.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2019-9502.

Immediate Steps to Take

Update the Broadcom wl driver to a patched version.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update all system drivers and software to prevent vulnerabilities.

Patching and Updates

Apply security patches provided by Broadcom to address the heap buffer overflow vulnerability.