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netfilter: Validate the sequence number of dataless ACK packets as well
author
Jozsef Kadlecsik
<kadlec@blackhole.kfki.hu>
Fri, 31 Aug 2012 09:55:54 +0000
(09:55 +0000)
committer
Pablo Neira Ayuso
<pablo@netfilter.org>
Sun, 9 Sep 2012 20:13:49 +0000
(22:13 +0200)
We spare nothing by not validating the sequence number of dataless
ACK packets and enabling it makes harder off-path attacks.
See: "Reflection scan: an Off-Path Attack on TCP" by Jan Wrobel,
http://arxiv.org/abs/1201.2074
Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
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git.openpandora.org / pandora-kernel.git / commitdiff