From: Johannes Berg <johannes@xxxxxxxxxxxxxxxx> Date: Thu, 20 Apr 2017 21:32:16 +0200 > From: Johannes Berg <johannes.berg@xxxxxxxxx> > > AP/AP_VLAN modes don't accept any real 802.11 multicast data > frames, but since they do need to accept broadcast management > frames the same is currently permitted for data frames. This > opens a security problem because such frames would be decrypted > with the GTK, and could even contain unicast L3 frames. > > Since the spec says that ToDS frames must always have the BSSID > as the RA (addr1), reject any other data frames. > > The problem was originally reported in "Predicting, Decrypting, > and Abusing WPA2/802.11 Group Keys" at usenix > https://www.usenix.org/conference/usenixsecurity16/technical-sessions/presentation/vanhoef > and brought to my attention by Jouni. > > Cc: stable@xxxxxxxxxxxxxxx > Reported-by: Jouni Malinen <j@xxxxx> > Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> > -- > Dave, I didn't want to send you a new pull request for a single > commit yet again - can you apply this one patch as is? Sure, done.
