From owner-freebsd-wireless@freebsd.org  Sat Oct 22 19:46:32 2016
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Subject: [Bug 213621] WIFI connection is lost periodically on ath0
Date: Sat, 22 Oct 2016 19:46:32 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D213621

--- Comment #7 from Adrian Chadd <adrian@freebsd.org> ---
God damnit, okay. So it /looks/ like a single bit corruption of the RSC, wh=
ich
causes the AES-CCM code to consider everything afterwards to be a replay
attack.

ie:

Adrians-MacBook-Pro:~ adrian$ perl -e 'printf "%x\n", 3407656;'
33ff28
Adrians-MacBook-Pro:~ adrian$ perl -e 'printf "%x\n", 2150891303;'
8033ff27

Those are from your AES-CCM replay logs.

I would've thought that a single bit error would've been caught by the MAC
CRC/FCS.


-adrian

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