CVE-2024-43841 Information

Description

In the Linux kernel the following vulnerability has been resolved:

wifi: virt_wifi: avoid reporting connection success with wrong SSID

When user issues a connection with a different SSID than the one virt_wifi has advertised the __cfg80211_connect_result() will trigger the warning: WARN_ON(bss_not_found).

The issue is because the connection code in virt_wifi does not check the SSID from user space (it only checks the BSSID) and virt_wifi will call cfg80211_connect_result() with WLAN_STATUS_SUCCESS even if the SSID is different from the one virt_wifi has advertised. Eventually cfg80211 won’t be able to find the cfg80211_bss and generate the warning.

Fixed it by checking the SSID (from user space) in the connection code.

Reference

https://git.kernel.org/stable/c/d3cc85a10abc8eae48988336cdd3689ab92581b3 https://git.kernel.org/stable/c/36e92b5edc8e0daa18e9325674313802ce3fbc29 https://git.kernel.org/stable/c/416d3c1538df005195721a200b0371d39636e05d https://git.kernel.org/stable/c/b5d14b0c6716fad7f0c94ac6e1d6f60a49f985c7