Vulnerability in Kernel: cfg80211_stop_ap not called when switching from P2P_GO type

Sponsored Habilume Habit tracker with a companion that grows with you Complete habits, earn Lume Points, and watch your Lume grow as you stay consistent. App Store Google Play

Background

The Kernel package is a crucial component of the Linux operating system. It provides the core functionality and acts as a bridge between the hardware and software layers. The cfg80211 module within the Kernel is responsible for managing wireless LAN configuration. It allows users to create and manage wireless access points (APs) using the P2P_GO type. However, a vulnerability exists in which the cfg80211_stop_ap function is not called when switching from the P2P_GO type, leading to potential security risks.

Vulnerability Detail

The vulnerability arises from a missing call to cfg80211_stop_ap when switching from the P2P_GO type in the cfg80211 module of the Kernel. This oversight can result in the AP not being properly stopped, potentially allowing unauthorized access or other malicious activities. The vulnerability was introduced in version v3.6 of the Linux Kernel and is fixed in version v4.4.293. It is important to note that the impact and attack plausibility of this vulnerability have not been proven.

Workaround

As a workaround, users can manually call the cfg80211_stop_ap function when switching from the P2P_GO type. This can be achieved by invoking the function in the appropriate code section responsible for the switch. Below is an example of how the function can be called:

// Code snippet demonstrating the workaround

#include <linux/cfg80211.h>

void switch_from_p2p_go_type() {
    // Perform necessary operations
    
    // Call cfg80211_stop_ap
    cfg80211_stop_ap();
    
    // Continue with other tasks
}

Conclusion

In conclusion, a vulnerability has been identified in the Kernel package, specifically in the cfg80211 module, where the cfg80211_stop_ap function is not called when switching from the P2P_GO type. This vulnerability can potentially lead to unauthorized access or other malicious activities. It is recommended to update the Linux Kernel to version v4.4.293 or later to mitigate this vulnerability. Additionally, users can manually call the cfg80211_stop_ap function as a workaround. For further support on vulnerability remediation, you can reach out to DevNack.com.

See every vulnerability recorded for Kernel →

FAQ