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linux-stable-mirror/net/netfilter
David LeadbeaterandGreg Kroah-Hartman e12ce30fe5 netfilter: nf_conntrack_irc: Fix forged IP logic
[ Upstream commit 0efe125cfb ]

Ensure the match happens in the right direction, previously the
destination used was the server, not the NAT host, as the comment
shows the code intended.

Additionally nf_nat_irc uses port 0 as a signal and there's no valid way
it can appear in a DCC message, so consider port 0 also forged.

Fixes: 869f37d8e4 ("[NETFILTER]: nf_conntrack/nf_nat: add IRC helper port")
Signed-off-by: David Leadbeater <dgl@dgl.cx>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-09-15 11:32:05 +02:00
..