rules/decoder-events.rules


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# Decoder event signatures for Suricata.
# SID's fall in the 2200000+ range. See http://doc.emergingthreats.net/bin/view/Main/SidAllocation
alert pkthdr any any -> any any (msg:"SURICATA IPv4 packet too small"; decode-event:ipv4.pkt_too_small; classtype:protocol-command-decode; sid:2200000; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 header size too small"; decode-event:ipv4.hlen_too_small; classtype:protocol-command-decode; sid:2200001; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 total length smaller than header size"; decode-event:ipv4.iplen_smaller_than_hlen; classtype:protocol-command-decode; sid:2200002; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 truncated packet"; decode-event:ipv4.trunc_pkt; classtype:protocol-command-decode; sid:2200003; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 invalid option"; decode-event:ipv4.opt_invalid; classtype:protocol-command-decode; sid:2200004; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 invalid option length"; decode-event:ipv4.opt_invalid_len; classtype:protocol-command-decode; sid:2200005; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 malformed option"; decode-event:ipv4.opt_malformed; classtype:protocol-command-decode; sid:2200006; rev:2;)
#alert pkthdr any any -> any any (msg:"SURICATA IPv4 padding required "; decode-event:ipv4.opt_pad_required; classtype:protocol-command-decode; sid:2200007; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 with ICMPv6 header"; decode-event:ipv4.icmpv6; classtype:protocol-command-decode; sid:2200092; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 option end of list required"; decode-event:ipv4.opt_eol_required; classtype:protocol-command-decode; sid:2200008; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 duplicated IP option"; decode-event:ipv4.opt_duplicate; classtype:protocol-command-decode; sid:2200009; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 unknown IP option"; decode-event:ipv4.opt_unknown; classtype:protocol-command-decode; sid:2200010; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4 wrong IP version"; decode-event:ipv4.wrong_ip_version; classtype:protocol-command-decode; sid:2200011; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 packet too small"; decode-event:ipv6.pkt_too_small; classtype:protocol-command-decode; sid:2200012; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 truncated packet"; decode-event:ipv6.trunc_pkt; classtype:protocol-command-decode; sid:2200013; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 truncated extension header"; decode-event:ipv6.trunc_exthdr; classtype:protocol-command-decode; sid:2200014; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicated Fragment extension header"; decode-event:ipv6.exthdr_dupl_fh; classtype:protocol-command-decode; sid:2200015; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 useless Fragment extension header"; decode-event:ipv6.exthdr_useless_fh; classtype:protocol-command-decode; sid:2200080; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicated Routing extension header"; decode-event:ipv6.exthdr_dupl_rh; classtype:protocol-command-decode; sid:2200016; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicated Hop-By-Hop Options extension header"; decode-event:ipv6.exthdr_dupl_hh; classtype:protocol-command-decode; sid:2200017; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicated Destination Options extension header"; decode-event:ipv6.exthdr_dupl_dh; classtype:protocol-command-decode; sid:2200018; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicated Authentication Header extension header"; decode-event:ipv6.exthdr_dupl_ah; classtype:protocol-command-decode; sid:2200019; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 duplicate ESP extension header"; decode-event:ipv6.exthdr_dupl_eh; classtype:protocol-command-decode; sid:2200020; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 invalid option length in header"; decode-event:ipv6.exthdr_invalid_optlen; classtype:protocol-command-decode; sid:2200021; rev:3;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6 wrong IP version"; decode-event:ipv6.wrong_ip_version; classtype:protocol-command-decode; sid:2200022; rev:2;)
# RFC 4302 states the reserved field should be 0.
alert pkthdr any any -> any any (msg:"SURICATA IPv6 AH reserved field not 0"; decode-event:ipv6.exthdr_ah_res_not_null; classtype:protocol-command-decode; sid:2200081; rev:2;)
# HOP option that we don't understand
alert pkthdr any any -> any any (msg:"SURICATA IPv6 HOPOPTS unknown option"; decode-event:ipv6.hopopts_unknown_opt; classtype:protocol-command-decode; sid:2200086; rev:2;)
# HOP header with only padding, covert channel?
alert pkthdr any any -> any any (msg:"SURICATA IPv6 HOPOPTS only padding"; decode-event:ipv6.hopopts_only_padding; classtype:protocol-command-decode; sid:2200087; rev:2;)
# DST option that we don't understand
alert pkthdr any any -> any any (msg:"SURICATA IPv6 DSTOPTS unknown option"; decode-event:ipv6.dstopts_unknown_opt; classtype:protocol-command-decode; sid:2200088; rev:2;)
# DST header with only padding, covert channel?
alert pkthdr any any -> any any (msg:"SURICATA IPv6 DSTOPTS only padding"; decode-event:ipv6.dstopts_only_padding; classtype:protocol-command-decode; sid:2200089; rev:2;)
# Type 0 Routing header deprecated per RFC 5095
alert ipv6 any any -> any any (msg:"SURICATA RH Type 0"; decode-event:ipv6.rh_type_0; classtype:protocol-command-decode; sid:2200093; rev:2;)
# padN option with zero length field. This is not uncommon, so disabled by default.
#alert ipv6 any any -> any any (msg:"SURICATA zero length padN option"; decode-event:ipv6.zero_len_padn; classtype:protocol-command-decode; sid:2200094; rev:2;)
# Frag Header 'length' field is reserved and should be 0
alert ipv6 any any -> any any (msg:"SURICATA reserved field in Frag Header not zero"; decode-event:ipv6.fh_non_zero_reserved_field; classtype:protocol-command-decode; sid:2200095; rev:2;)
# Data after the 'none' header (59) is suspicious.
alert ipv6 any any -> any any (msg:"SURICATA data after none (59) header"; decode-event:ipv6.data_after_none_header; classtype:protocol-command-decode; sid:2200096; rev:2;)
# unknown/unsupported next header / protocol. Valid protocols are not yet supported, so disabling by default
#alert ipv6 any any -> any any (msg:"SURICATA unknown next header / protocol"; decode-event:ipv6.unknown_next_header; classtype:protocol-command-decode; sid:2200097; rev:2;)
alert ipv6 any any -> any any (msg:"SURICATA IPv6 with ICMPv4 header"; decode-event:ipv6.icmpv4; classtype:protocol-command-decode; sid:2200090; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv4 packet too small"; decode-event:icmpv4.pkt_too_small; classtype:protocol-command-decode; sid:2200023; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv4 unknown type"; decode-event:icmpv4.unknown_type; classtype:protocol-command-decode; sid:2200024; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv4 unknown code"; decode-event:icmpv4.unknown_code; classtype:protocol-command-decode; sid:2200025; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv4 truncated packet"; decode-event:icmpv4.ipv4_trunc_pkt; classtype:protocol-command-decode; sid:2200026; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv4 unknown version"; decode-event:icmpv4.ipv4_unknown_ver; classtype:protocol-command-decode; sid:2200027; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 packet too small"; decode-event:icmpv6.pkt_too_small; classtype:protocol-command-decode; sid:2200028; rev:2;)
# uncomment the following signature if you plan to update suricata code to support more ICMPv6 type
#alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 unknown type"; decode-event:icmpv6.unknown_type; classtype:protocol-command-decode; sid:2200029; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 unknown code"; decode-event:icmpv6.unknown_code; classtype:protocol-command-decode; sid:2200030; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 truncated packet"; decode-event:icmpv6.ipv6_trunc_pkt; classtype:protocol-command-decode; sid:2200031; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 unknown version"; decode-event:icmpv6.ipv6_unknown_version; classtype:protocol-command-decode; sid:2200032; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 MLD hop limit not 1"; decode-event:icmpv6.mld_message_with_invalid_hl; classtype:protocol-command-decode; sid:2200102; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 unassigned type"; decode-event:icmpv6.unassigned_type; classtype:protocol-command-decode; sid:2200108; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ICMPv6 private experimentation type"; decode-event:icmpv6.experimentation_type; classtype:protocol-command-decode; sid:2200109; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA TCP packet too small"; decode-event:tcp.pkt_too_small; classtype:protocol-command-decode; sid:2200033; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA TCP header length too small"; decode-event:tcp.hlen_too_small; classtype:protocol-command-decode; sid:2200034; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA TCP invalid option length"; decode-event:tcp.invalid_optlen; classtype:protocol-command-decode; sid:2200035; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA TCP option invalid length"; decode-event:tcp.opt_invalid_len; classtype:protocol-command-decode; sid:2200036; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA TCP duplicated option"; decode-event:tcp.opt_duplicate; classtype:protocol-command-decode; sid:2200037; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA UDP packet too small"; decode-event:udp.pkt_too_small; classtype:protocol-command-decode; sid:2200038; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA UDP header length too small"; decode-event:udp.hlen_too_small; classtype:protocol-command-decode; sid:2200039; rev:2;)
# 2200040 "udp.hlen_invalid" has been retired.
alert pkthdr any any -> any any (msg:"SURICATA UDP invalid length field in the header"; decode-event:udp.len_invalid; classtype:protocol-command-decode; sid:2200120; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA SLL packet too small"; decode-event:sll.pkt_too_small; classtype:protocol-command-decode; sid:2200041; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA Ethernet packet too small"; decode-event:ethernet.pkt_too_small; classtype:protocol-command-decode; sid:2200042; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP packet too small"; decode-event:ppp.pkt_too_small; classtype:protocol-command-decode; sid:2200043; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP VJU packet too small"; decode-event:ppp.vju_pkt_too_small; classtype:protocol-command-decode; sid:2200044; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP IPv4 packet too small"; decode-event:ppp.ip4_pkt_too_small; classtype:protocol-command-decode; sid:2200045; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP IPv6 too small"; decode-event:ppp.ip6_pkt_too_small; classtype:protocol-command-decode; sid:2200046; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP wrong type"; decode-event:ppp.wrong_type; classtype:protocol-command-decode; sid:2200047; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPP unsupported protocol"; decode-event:ppp.unsup_proto; classtype:protocol-command-decode; sid:2200048; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPPOE packet too small"; decode-event:pppoe.pkt_too_small; classtype:protocol-command-decode; sid:2200049; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPPOE wrong code"; decode-event:pppoe.wrong_code; classtype:protocol-command-decode; sid:2200050; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA PPPOE malformed tags"; decode-event:pppoe.malformed_tags; classtype:protocol-command-decode; sid:2200051; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE packet too small"; decode-event:gre.pkt_too_small; classtype:protocol-command-decode; sid:2200052; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE wrong version"; decode-event:gre.wrong_version; classtype:protocol-command-decode; sid:2200053; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v0 recursion control"; decode-event:gre.version0_recur; classtype:protocol-command-decode; sid:2200054; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v0 flags"; decode-event:gre.version0_flags; classtype:protocol-command-decode; sid:2200055; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v0 header too big"; decode-event:gre.version0_hdr_too_big; classtype:protocol-command-decode; sid:2200056; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 checksum present"; decode-event:gre.version1_chksum; classtype:protocol-command-decode; sid:2200057; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 routing present"; decode-event:gre.version1_route; classtype:protocol-command-decode; sid:2200058; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 strict source route"; decode-event:gre.version1_ssr; classtype:protocol-command-decode; sid:2200059; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 recursion control"; decode-event:gre.version1_recur; classtype:protocol-command-decode; sid:2200060; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 flags"; decode-event:gre.version1_flags; classtype:protocol-command-decode; sid:2200061; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 no key present"; decode-event:gre.version1_no_key; classtype:protocol-command-decode; sid:2200062; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 wrong protocol"; decode-event:gre.version1_wrong_protocol; classtype:protocol-command-decode; sid:2200063; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 malformed Source Route Entry header"; decode-event:gre.version1_malformed_sre_hdr; classtype:protocol-command-decode; sid:2200064; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA GRE v1 header too big"; decode-event:gre.version1_hdr_too_big; classtype:protocol-command-decode; sid:2200065; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA VLAN header too small "; decode-event:vlan.header_too_small; classtype:protocol-command-decode; sid:2200066; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA VLAN unknown type"; decode-event:vlan.unknown_type; classtype:protocol-command-decode; sid:2200067; rev:2;)
# more than 2 vlan layers in the packet
alert pkthdr any any -> any any (msg:"SURICATA VLAN too many layers"; decode-event:vlan.too_many_layers; classtype:protocol-command-decode; sid:2200091; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA VNTAG header too small"; decode-event:vntag.header_too_small; classtype:protocol-command-decode; sid:2200117; rev:1;)
alert pkthdr any any -> any any (msg:"SURICATA VNTAG unknown type"; decode-event:vntag.unknown_type; classtype:protocol-command-decode; sid:2200118; rev:1;)
alert pkthdr any any -> any any (msg:"SURICATA IEEE802.1AH header too small"; decode-event:ieee8021ah.header_too_small; classtype:protocol-command-decode; sid:2200112; rev:1;)

alert pkthdr any any -> any any (msg:"SURICATA IP raw invalid IP version "; decode-event:ipraw.invalid_ip_version; classtype:protocol-command-decode; sid:2200068; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA FRAG IPv4 Packet size too large"; decode-event:ipv4.frag_pkt_too_large; classtype:protocol-command-decode; sid:2200069; rev:3;)
alert pkthdr any any -> any any (msg:"SURICATA FRAG IPv4 Fragmentation overlap"; decode-event:ipv4.frag_overlap; classtype:protocol-command-decode; sid:2200070; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA FRAG IPv6 Packet size too large"; decode-event:ipv6.frag_pkt_too_large; classtype:protocol-command-decode; sid:2200071; rev:3;)
alert pkthdr any any -> any any (msg:"SURICATA FRAG IPv6 Fragmentation overlap"; decode-event:ipv6.frag_overlap; classtype:protocol-command-decode; sid:2200072; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA FRAG IPv6 Fragment invalid length"; decode-event:ipv6.frag_invalid_length; classtype:protocol-command-decode; sid:2200119; rev:1;)

# checksum rules
alert ip any any -> any any (msg:"SURICATA IPv4 invalid checksum"; ipv4-csum:invalid; classtype:protocol-command-decode; sid:2200073; rev:2;)
alert tcp any any -> any any (msg:"SURICATA TCPv4 invalid checksum"; tcpv4-csum:invalid; classtype:protocol-command-decode; sid:2200074; rev:2;)
alert udp any any -> any any (msg:"SURICATA UDPv4 invalid checksum"; udpv4-csum:invalid; classtype:protocol-command-decode; sid:2200075; rev:2;)
alert icmp any any -> any any (msg:"SURICATA ICMPv4 invalid checksum"; icmpv4-csum:invalid; classtype:protocol-command-decode; sid:2200076; rev:2;)
alert tcp any any -> any any (msg:"SURICATA TCPv6 invalid checksum"; tcpv6-csum:invalid; classtype:protocol-command-decode; sid:2200077; rev:2;)
alert udp any any -> any any (msg:"SURICATA UDPv6 invalid checksum"; udpv6-csum:invalid; classtype:protocol-command-decode; sid:2200078; rev:2;)
alert icmp any any -> any any (msg:"SURICATA ICMPv6 invalid checksum"; icmpv6-csum:invalid; classtype:protocol-command-decode; sid:2200079; rev:2;)
# IPv4 in IPv6 rules
alert pkthdr any any -> any any (msg:"SURICATA IPv4-in-IPv6 packet too short"; decode-event:ipv6.ipv4_in_ipv6_too_small; classtype:protocol-command-decode; sid:2200082; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv4-in-IPv6 invalid protocol"; decode-event:ipv6.ipv4_in_ipv6_wrong_version; classtype:protocol-command-decode; sid:2200083; rev:2;)
# IPv6 in IPv6 rules
alert pkthdr any any -> any any (msg:"SURICATA IPv6-in-IPv6 packet too short"; decode-event:ipv6.ipv6_in_ipv6_too_small; classtype:protocol-command-decode; sid:2200084; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA IPv6-in-IPv6 invalid protocol"; decode-event:ipv6.ipv6_in_ipv6_wrong_version; classtype:protocol-command-decode; sid:2200085; rev:2;)

# MPLS rules
alert pkthdr any any -> any any (msg:"SURICATA MPLS header too small"; decode-event:mpls.header_too_small; classtype:protocol-command-decode; sid:2200111; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA MPLS packet too small"; decode-event:mpls.pkt_too_small; classtype:protocol-command-decode; sid:2200114; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA MPLS bad router alert label"; decode-event:mpls.bad_label_router_alert; classtype:protocol-command-decode; sid:2200098; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA MPLS bad implicit null label"; decode-event:mpls.bad_label_implicit_null; classtype:protocol-command-decode; sid:2200099; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA MPLS reserved label"; decode-event:mpls.bad_label_reserved; classtype:protocol-command-decode; sid:2200100; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA MPLS unknown payload type"; decode-event:mpls.unknown_payload_type; classtype:protocol-command-decode; sid:2200101; rev:2;)

# linktype null
alert pkthdr any any -> any any (msg:"SURICATA NULL pkt too small"; decode-event:ltnull.pkt_too_small; classtype:protocol-command-decode; sid:2200103; rev:2;)
# packet has type not supported by Suricata's decoders
alert pkthdr any any -> any any (msg:"SURICATA NULL unsupported type"; decode-event:ltnull.unsupported_type; classtype:protocol-command-decode; sid:2200104; rev:2;)

# ERSPAN
alert pkthdr any any -> any any (msg:"SURICATA ERSPAN pkt too small"; decode-event:erspan.header_too_small; classtype:protocol-command-decode; sid:2200105; rev:2;)
# packet has type not supported by Suricata's decoders
alert pkthdr any any -> any any (msg:"SURICATA ERSPAN unsupported version"; decode-event:erspan.unsupported_version; classtype:protocol-command-decode; sid:2200106; rev:2;)
alert pkthdr any any -> any any (msg:"SURICATA ERSPAN too many vlan layers"; decode-event:erspan.too_many_vlan_layers; classtype:protocol-command-decode; sid:2200107; rev:2;)

# Cisco Fabric Path/DCE
alert pkthdr any any -> any any (msg:"SURICATA DCE packet too small"; decode-event:dce.pkt_too_small; classtype:protocol-command-decode; sid:2200110; rev:2;)

# Cisco HDLC
alert pkthdr any any -> any any (msg:"SURICATA CHDLC packet too small"; decode-event:chdlc.pkt_too_small; classtype:protocol-command-decode; sid:2200115; rev:1;)

alert pkthdr any any -> any any (msg:"SURICATA packet with too many layers"; decode-event:too_many_layers; classtype:protocol-command-decode; sid:2200116; rev:1;)

# next sid is 2200121