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suricata/rules
History
Philippe Antoine 4713ce44c2 tcp: rejects FIN+SYN packets as invalid 
Ticket: #4569

If a FIN+SYN packet is sent, the destination may keep the
connection alive instead of starting to close it.
In this case, a later SYN packet will be ignored by the
destination.

Previously, Suricata considered this a session reuse, and thus
used the sequence number of the last SYN packet, instead of
using the one of the live connection, leading to evasion.

This commit errors on FIN+SYN so that they do not get
processed as regular FIN packets.

(cherry picked from commit 6cb6225b28)
 		4 years ago
..
Makefile.am rules: install dhcp-events.rules; order alphabetically 7 years ago
app-layer-events.rules
…
decoder-events.rules ipv6: decoder event on invalid length 5 years ago
dhcp-events.rules
…
dnp3-events.rules
…
dns-events.rules
…
files.rules
…
http-events.rules http: sets compression bomb limit 7 years ago
ipsec-events.rules
…
kerberos-events.rules
…
modbus-events.rules
…
nfs-events.rules
…
ntp-events.rules
…
smb-events.rules smb: adds file overlap event against evasions 6 years ago
smtp-events.rules smtp/mime: Set event when name exceeds limit 6 years ago
stream-events.rules tcp: rejects FIN+SYN packets as invalid 4 years ago
tls-events.rules
…