diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2016-02-04 13:31:19 +0100 |
|---|---|---|
| committer | Michael Bestas <mkbestas@lineageos.org> | 2019-12-23 23:43:37 +0200 |
| commit | 1a47124756646bf3f42eab939adccba186ec63bf (patch) | |
| tree | 8d83e7f43909e465696fb42a9d2912c520557873 /include/linux | |
| parent | 3bef096d177a1ef6203e2eab27f88b1381c7e4c3 (diff) | |
ipv6: add option to drop unicast encapsulated in L2 multicast
In order to solve a problem with 802.11, the so-called hole-196 attack,
add an option (sysctl) called "drop_unicast_in_l2_multicast" which, if
enabled, causes the stack to drop IPv6 unicast packets encapsulated in
link-layer multi- or broadcast frames. Such frames can (as an attack)
be created by any member of the same wireless network and transmitted
as valid encrypted frames since the symmetric key for broadcast frames
is shared between all stations.
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit dede82143bf1bbf92ea73a519bb0298b19c56cb9)
Change-Id: I76c8f84b53e95c40ad3c2b5adac0ec4964cc920c
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/ipv6.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/ipv6.h b/include/linux/ipv6.h index 7631503cd33f..53e7b5b9c83f 100644 --- a/include/linux/ipv6.h +++ b/include/linux/ipv6.h @@ -53,6 +53,7 @@ struct ipv6_devconf { __s32 mc_forwarding; #endif __s32 disable_ipv6; + __s32 drop_unicast_in_l2_multicast; __s32 accept_dad; __s32 force_tllao; __s32 ndisc_notify; |