wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex
Apparently the hex passphrase mechanism does not work on newer
chips/firmware (e.g. BCM4387). It seems there was a simple way of
passing it in binary all along, so use that and avoid the hexification.
OpenBSD has been doing it like this from the beginning, so this should
work on all chips.
Also clear the structure before setting the PMK. This was leaking
uninitialized stack contents to the device.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/1687845eb8f37360a9ee849a3587ab659b090773https://git.kernel.org/stable/c/2bc34facb90ceeff6f8c17d2006575a6d07c3825https://git.kernel.org/stable/c/2fa3a5226b05e0a797c68b9609dcebe0cd236b27https://git.kernel.org/stable/c/4e8dc0e5c7636efaadbd7e488acd34b4291c0431https://git.kernel.org/stable/c/56c7e9c39bd54fd753c0c4b1ed10278cbd3a5f02https://git.kernel.org/stable/c/89b89e52153fda2733562776c7c9d9d3ebf8dd6dhttps://git.kernel.org/stable/c/e242c66f7ecfe8f5b6eb308f4ea464fd8589c866https://git.kernel.org/stable/c/f8a6c53ff1d91acd5a20eb627edbffd816eb9a4e