Fix buffer overflow in 802.11 decryption

The sha1 function outputs a multiple of 20 bytes while the ptk buffer
has only a size of 64 bytes. Follow the hint in 802.11i-2004, page 164
and use an output buffer of 80 octets.

Noticed when running Wireshark with ASAN, on exit it would try to free a
"next" pointer which was filled with sha1 garbage. It probably got
triggered via 3f8fbb734915aaf74eb006898e8fabb007afbf48 which made
AirPDcap responsible for managing its own memory.

Bug: 10849
Change-Id: I10c1b9c2e224e5571d746c01fc389f86d25994a1
Reviewed-on: https://code.wireshark.org/review/7645
Reviewed-by: Evan Huus <eapache@gmail.com>
Petri-Dish: Michael Mann <mmann78@netscape.net>
Reviewed-by: Peter Wu <peter@lekensteyn.nl>
Tested-by: Peter Wu <peter@lekensteyn.nl>
Reviewed-by: Michael Mann <mmann78@netscape.net>

0 files changed, 0 insertions, 0 deletions