CVE-2024-43841: wifi: virt_wifi: avoid reporting connection success with wrong SSID
First published: Sat Aug 17 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=5.0<6.1.103 | |
| Linux Linux kernel | >=6.2<6.6.44 | |
| Linux Linux kernel | >=6.7<6.10.3 | |
| debian/linux | <=5.10.223-1 | 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 |
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Reference Links
- https://git.kernel.org/stable/c/994fc2164a03200c3bf42fb45b3d49d9d6d33a4d
- https://git.kernel.org/stable/c/05c4488a0e446c6ccde9f22b573950665e1cd414
- https://git.kernel.org/stable/c/93e898a264b4e0a475552ba9f99a016eb43ef942
- 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
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43841
- https://nvd.nist.gov/vuln/detail/CVE-2024-43841
- https://launchpad.net/bugs/cve/CVE-2024-43841
- https://security-tracker.debian.org/tracker/CVE-2024-43841
- https://ubuntu.com/security/CVE-2024-43841
- https://git.kernel.org/linus/b5d14b0c6716fad7f0c94ac6e1d6f60a49f985c7
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