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Re: Snorting a Kismet tun/tap interface: Cannot decode data link type 105

From: rmkml <rmkml () yahoo fr>
Date: Tue, 9 Jul 2013 14:33:02 +0200 (CEST)
Hi Hayden,

Could you try with "--enable-non-ether-decoders" on configure cmd line please ?

Regards
@Rmkml



On Tue, 9 Jul 2013, Hayden Stainsby wrote:


I am trying to snort (amongst other interfaces) a Kismet tun/tap
interface, and am receiving this error:

ERROR: Cannot decode data link type 105

When I went through the snort code, it looked as if 105 refers to
DLT_IEEE802_11, which makes sense given that I'm reading wireless data
out of kismet.

I've recently upgraded to Ubuntu 12.04 LTS, which is when I started
getting this error. I have tried with both the install that I had of
Snort 2.9.1 which was working before the upgrade and also a new
install of Snort 2.9.5, both produce the same error, but only for the
kistap1 device that Kismet creates, I am also using snort on eth0 and
wlan0 with no problems.

Right now I'm running it as root to test, so I don't think it's a
permission issue.

I've included the output running snort with no configuration file and
with the default configuration file below (the second one is quite
long, sorry about that).

Any help or pointers would be most appreciated.

Thanks in advance,

Hayden


Running snort with no configuration file gives the following output:

# ./bin/snort -i kistap1
Running in packet dump mode

       --== Initializing Snort ==--
Initializing Output Plugins!
pcap DAQ configured to passive.
Acquiring network traffic from "kistap1".
ERROR: Cannot decode data link type 105
Fatal Error, Quitting..


And running it with the default snort configuration gives:

# ./bin/snort -i kistap1 -c etc/snort.conf
Running in IDS mode

       --== Initializing Snort ==--
Initializing Output Plugins!
Initializing Preprocessors!
Initializing Plug-ins!
Parsing Rules file "etc/snort.conf"
PortVar 'HTTP_PORTS' defined :  [ 80:89 311 383 591 593 631 901 1220
1414 1741 1830 2301 2381 2809 3037 3057 3128 3702 4343 4848 5250 6080
6988 7000:7001 7144:7145 7510 7777 7779 8000 8008 8014 8028 8080 8085
8088 8090 8118 8123 8180:8181 8222 8243 8280 8300 8500 8800 8888 8899
9000 9060 9080 9090:9091 9443 9999:10000 11371 34443:34444 41080 50002
55555 ]
PortVar 'SHELLCODE_PORTS' defined :  [ 0:79 81:65535 ]
PortVar 'ORACLE_PORTS' defined :  [ 1024:65535 ]
PortVar 'SSH_PORTS' defined :  [ 22 ]
PortVar 'FTP_PORTS' defined :  [ 21 2100 3535 ]
PortVar 'SIP_PORTS' defined :  [ 5060:5061 5600 ]
PortVar 'FILE_DATA_PORTS' defined :  [ 80:89 110 143 311 383 591 593
631 901 1220 1414 1741 1830 2301 2381 2809 3037 3057 3128 3702 4343
4848 5250 6080 6988 7000:7001 7144:7145 7510 7777 7779 8000 8008 8014
8028 8080 8085 8088 8090 8118 8123 8180:8181 8222 8243 8280 8300 8500
8800 8888 8899 9000 9060 9080 9090:9091 9443 9999:10000 11371
34443:34444 41080 50002 55555 ]
PortVar 'GTP_PORTS' defined :  [ 2123 2152 3386 ]
Detection:
  Search-Method = AC-Full-Q
   Split Any/Any group = enabled
   Search-Method-Optimizations = enabled
   Maximum pattern length = 20
Tagged Packet Limit: 256
Loading dynamic engine
/usr/local/snort/lib/snort_dynamicengine/libsf_engine.so... done
Loading all dynamic detection libs from
/usr/local/snort/lib/snort_dynamicrules...
WARNING: No dynamic libraries found in directory
/usr/local/snort/lib/snort_dynamicrules.
 Finished Loading all dynamic detection libs from
/usr/local/snort/lib/snort_dynamicrules
Loading all dynamic preprocessor libs from
/usr/local/snort/lib/snort_dynamicpreprocessor/...
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_ssl_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_reputation_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_ftptelnet_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_dce2_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_modbus_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_sip_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_dnp3_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_smtp_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_dns_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_gtp_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_imap_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_ssh_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_pop_preproc.so...
done
 Loading dynamic preprocessor library
/usr/local/snort/lib/snort_dynamicpreprocessor//libsf_sdf_preproc.so...
done
 Finished Loading all dynamic preprocessor libs from
/usr/local/snort/lib/snort_dynamicpreprocessor/
Log directory = /var/log/snort
WARNING: ip4 normalizations disabled because not inline.
WARNING: tcp normalizations disabled because not inline.
WARNING: icmp4 normalizations disabled because not inline.
WARNING: ip6 normalizations disabled because not inline.
WARNING: icmp6 normalizations disabled because not inline.
Frag3 global config:
   Max frags: 65536
   Fragment memory cap: 4194304 bytes
Frag3 engine config:
   Bound Address: default
   Target-based policy: WINDOWS
   Fragment timeout: 180 seconds
   Fragment min_ttl:   1
   Fragment Anomalies: Alert
   Overlap Limit:     10
   Min fragment Length:     100
Stream5 global config:
   Track TCP sessions: ACTIVE
   Max TCP sessions: 262144
   TCP cache pruning timeout: 30 seconds
   TCP cache nominal timeout: 3600 seconds
   Memcap (for reassembly packet storage): 8388608
   Track UDP sessions: ACTIVE
   Max UDP sessions: 131072
   UDP cache pruning timeout: 30 seconds
   UDP cache nominal timeout: 180 seconds
   Track ICMP sessions: INACTIVE
   Track IP sessions: INACTIVE
   Log info if session memory consumption exceeds 1048576
   Send up to 2 active responses
   Wait at least 5 seconds between responses
   Protocol Aware Flushing: ACTIVE
       Maximum Flush Point: 16000
Stream5 TCP Policy config:
   Bound Address: default
   Reassembly Policy: WINDOWS
   Timeout: 180 seconds
   Limit on TCP Overlaps: 10
   Maximum number of bytes to queue per session: 1048576
   Maximum number of segs to queue per session: 2621
   Options:
       Require 3-Way Handshake: YES
       3-Way Handshake Timeout: 180
       Detect Anomalies: YES
   Reassembly Ports:
     21 client (Footprint)
     22 client (Footprint)
     23 client (Footprint)
     25 client (Footprint)
     42 client (Footprint)
     53 client (Footprint)
     70 client (Footprint)
     79 client (Footprint)
     80 client (Footprint) server (Footprint)
     81 client (Footprint) server (Footprint)
     82 client (Footprint) server (Footprint)
     83 client (Footprint) server (Footprint)
     84 client (Footprint) server (Footprint)
     85 client (Footprint) server (Footprint)
     86 client (Footprint) server (Footprint)
     87 client (Footprint) server (Footprint)
     88 client (Footprint) server (Footprint)
     89 client (Footprint) server (Footprint)
     109 client (Footprint)
     110 client (Footprint) server (Footprint)
     additional ports configured but not printed.
Stream5 UDP Policy config:
   Timeout: 180 seconds
HttpInspect Config:
   GLOBAL CONFIG
     Max Pipeline Requests:    0
     Inspection Type:          STATELESS
     Detect Proxy Usage:       NO
     IIS Unicode Map Filename: etc/unicode.map
     IIS Unicode Map Codepage: 1252
     Memcap used for logging URI and Hostname: 150994944
     Max Gzip Memory: 838860
     Max Gzip Sessions: 9532
     Gzip Compress Depth: 65535
     Gzip Decompress Depth: 65535
   DEFAULT SERVER CONFIG:
     Server profile: All
     Ports (PAF): 80 81 82 83 84 85 86 87 88 89 311 383 591 593 631
901 1220 1414 1741 1830 2301 2381 2809 3037 3057 3128 3702 4343 4848
5250 6080 6988 7000 7001 7144 7145 7510 7777 7779 8000 8008 8014 8028
8080 8085 8088 8090 8118 8123 8180 8181 8222 8243 8280 8300 8500 8800
8888 8899 9000 9060 9080 9090 9091 9443 9999 10000 11371 34443 34444
41080 50002 55555
     Server Flow Depth: 0
     Client Flow Depth: 0
     Max Chunk Length: 500000
     Small Chunk Length Evasion: chunk size <= 10, threshold >= 5 times
     Max Header Field Length: 750
     Max Number Header Fields: 100
     Max Number of WhiteSpaces allowed with header folding: 200
     Inspect Pipeline Requests: YES
     URI Discovery Strict Mode: NO
     Allow Proxy Usage: NO
     Disable Alerting: NO
     Oversize Dir Length: 500
     Only inspect URI: NO
     Normalize HTTP Headers: NO
     Inspect HTTP Cookies: YES
     Inspect HTTP Responses: YES
     Extract Gzip from responses: YES
     Unlimited decompression of gzip data from responses: YES
     Normalize Javascripts in HTTP Responses: YES
     Max Number of WhiteSpaces allowed with Javascript Obfuscation in
HTTP responses: 200
     Normalize HTTP Cookies: NO
     Enable XFF and True Client IP: NO
     Log HTTP URI data: NO
     Log HTTP Hostname data: NO
     Extended ASCII code support in URI: NO
     Ascii: YES alert: NO
     Double Decoding: YES alert: NO
     %U Encoding: YES alert: YES
     Bare Byte: YES alert: NO
     UTF 8: YES alert: NO
     IIS Unicode: YES alert: NO
     Multiple Slash: YES alert: NO
     IIS Backslash: YES alert: NO
     Directory Traversal: YES alert: NO
     Web Root Traversal: YES alert: NO
     Apache WhiteSpace: YES alert: NO
     IIS Delimiter: YES alert: NO
     IIS Unicode Map: GLOBAL IIS UNICODE MAP CONFIG
     Non-RFC Compliant Characters: 0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07
     Whitespace Characters: 0x09 0x0b 0x0c 0x0d
rpc_decode arguments:
   Ports to decode RPC on: 111 32770 32771 32772 32773 32774 32775
32776 32777 32778 32779
   alert_fragments: INACTIVE
   alert_large_fragments: INACTIVE
   alert_incomplete: INACTIVE
   alert_multiple_requests: INACTIVE
FTPTelnet Config:
   GLOBAL CONFIG
     Inspection Type: stateful
     Check for Encrypted Traffic: YES alert: NO
     Continue to check encrypted data: YES
   TELNET CONFIG:
     Ports: 23
     Are You There Threshold: 20
     Normalize: YES
     Detect Anomalies: YES
   FTP CONFIG:
     FTP Server: default
       Ports (PAF): 21 2100 3535
       Check for Telnet Cmds: YES alert: YES
       Ignore Telnet Cmd Operations: YES alert: YES
       Identify open data channels: NO
     FTP Client: default
       Check for Bounce Attacks: YES alert: YES
       Check for Telnet Cmds: YES alert: YES
       Ignore Telnet Cmd Operations: YES alert: YES
       Max Response Length: 256
SMTP Config:
   Ports: 25 465 587 691
   Inspection Type: Stateful
   Normalize: ATRN AUTH BDAT DATA DEBUG EHLO EMAL ESAM ESND ESOM ETRN
EVFY EXPN HELO HELP IDENT MAIL NOOP ONEX QUEU QUIT RCPT RSET SAML SEND
STARTTLS SOML TICK TIME TURN TURNME VERB VRFY X-EXPS XADR XAUTH XCIR
XEXCH50 XGEN XLICENSE X-LINK2STATE XQUE XSTA XTRN XUSR CHUNKING X-ADAT
X-DRCP X-ERCP X-EXCH50
   Ignore Data: No
   Ignore TLS Data: No
   Ignore SMTP Alerts: No
   Max Command Line Length: 512
   Max Specific Command Line Length:
      ATRN:255 AUTH:246 BDAT:255 DATA:246 DEBUG:255
      EHLO:500 EMAL:255 ESAM:255 ESND:255 ESOM:255
      ETRN:246 EVFY:255 EXPN:255 HELO:500 HELP:500
      IDENT:255 MAIL:260 NOOP:255 ONEX:246 QUEU:246
      QUIT:246 RCPT:300 RSET:246 SAML:246 SEND:246
      SIZE:255 STARTTLS:246 SOML:246 TICK:246 TIME:246
      TURN:246 TURNME:246 VERB:246 VRFY:255 X-EXPS:246
      XADR:246 XAUTH:246 XCIR:246 XEXCH50:246 XGEN:246
      XLICENSE:246 X-LINK2STATE:246 XQUE:246 XSTA:246 XTRN:246
      XUSR:246
   Max Header Line Length: 1000
   Max Response Line Length: 512
   X-Link2State Alert: Yes
   Drop on X-Link2State Alert: No
   Alert on commands: None
   Alert on unknown commands: No
   SMTP Memcap: 838860
   MIME Max Mem: 838860
   Base64 Decoding: Enabled
   Base64 Decoding Depth: Unlimited
   Quoted-Printable Decoding: Enabled
   Quoted-Printable Decoding Depth: Unlimited
   Unix-to-Unix Decoding: Enabled
   Unix-to-Unix Decoding Depth: Unlimited
   Non-Encoded MIME attachment Extraction: Enabled
   Non-Encoded MIME attachment Extraction Depth: Unlimited
   Log Attachment filename: Enabled
   Log MAIL FROM Address: Enabled
   Log RCPT TO Addresses: Enabled
   Log Email Headers: Enabled
   Email Hdrs Log Depth: 1464
SSH config:
   Autodetection: ENABLED
   Challenge-Response Overflow Alert: ENABLED
   SSH1 CRC32 Alert: ENABLED
   Server Version String Overflow Alert: ENABLED
   Protocol Mismatch Alert: ENABLED
   Bad Message Direction Alert: DISABLED
   Bad Payload Size Alert: DISABLED
   Unrecognized Version Alert: DISABLED
   Max Encrypted Packets: 20
   Max Server Version String Length: 100
   MaxClientBytes: 19600 (Default)
   Ports:
22
DCE/RPC 2 Preprocessor Configuration
 Global Configuration
   DCE/RPC Defragmentation: Enabled
   Memcap: 102400 KB
   Events: co
   SMB Fingerprint policy: Disabled
 Server Default Configuration
   Policy: WinXP
   Detect ports (PAF)
     SMB: 139 445
     TCP: 135
     UDP: 135
     RPC over HTTP server: 593
     RPC over HTTP proxy: None
   Autodetect ports (PAF)
     SMB: None
     TCP: 1025-65535
     UDP: 1025-65535
     RPC over HTTP server: 1025-65535
     RPC over HTTP proxy: None
   Invalid SMB shares: C$ D$ ADMIN$
   Maximum SMB command chaining: 3 commands
DNS config:
   DNS Client rdata txt Overflow Alert: ACTIVE
   Obsolete DNS RR Types Alert: INACTIVE
   Experimental DNS RR Types Alert: INACTIVE
   Ports: 53
SSLPP config:
   Encrypted packets: not inspected
   Ports:
     443      465      563      636      989
     992      993      994      995     7801
    7802     7900     7901     7902     7903
    7904     7905     7906     7907     7908
    7909     7910     7911     7912     7913
    7914     7915     7916     7917     7918
    7919     7920
   Server side data is trusted
Sensitive Data preprocessor config:
   Global Alert Threshold: 25
   Masked Output: DISABLED
SIP config:
   Max number of sessions: 40000
   Max number of dialogs in a session: 4 (Default)
   Status: ENABLED
   Ignore media channel: DISABLED
   Max URI length: 512
   Max Call ID length: 80
   Max Request name length: 20 (Default)
   Max From length: 256 (Default)
   Max To length: 256 (Default)
   Max Via length: 1024 (Default)
   Max Contact length: 512
   Max Content length: 2048
   Ports:
5060 5061 5600
   Methods:
invite cancel ack bye register options refer subscribe update join
info message notify benotify do qauth sprack publish service
unsubscribe prack
IMAP Config:
   Ports: 143
   IMAP Memcap: 838860
   MIME Max Mem: 838860
   Base64 Decoding: Enabled
   Base64 Decoding Depth: Unlimited
   Quoted-Printable Decoding: Enabled
   Quoted-Printable Decoding Depth: Unlimited
   Unix-to-Unix Decoding: Enabled
   Unix-to-Unix Decoding Depth: Unlimited
   Non-Encoded MIME attachment Extraction: Enabled
   Non-Encoded MIME attachment Extraction Depth: Unlimited
POP Config:
   Ports: 110
   POP Memcap: 838860
   MIME Max Mem: 838860
   Base64 Decoding: Enabled
   Base64 Decoding Depth: Unlimited
   Quoted-Printable Decoding: Enabled
   Quoted-Printable Decoding Depth: Unlimited
   Unix-to-Unix Decoding: Enabled
   Unix-to-Unix Decoding Depth: Unlimited
   Non-Encoded MIME attachment Extraction: Enabled
   Non-Encoded MIME attachment Extraction Depth: Unlimited
Modbus config:
   Ports:
502
DNP3 config:
   Memcap: 262144
   Check Link-Layer CRCs: ENABLED
   Ports:
20000
Reputation config:
WARNING: Can't find any whitelist/blacklist entries. Reputation
Preprocessor disabled.

+++++++++++++++++++++++++++++++++++++++++++++++++++
Initializing rule chains...
3802 Snort rules read
   3802 detection rules
   0 decoder rules
   0 preprocessor rules
3802 Option Chains linked into 196 Chain Headers
0 Dynamic rules
+++++++++++++++++++++++++++++++++++++++++++++++++++

+-------------------[Rule Port Counts]---------------------------------------
|             tcp     udp    icmp      ip
|     src    1616       5       0       0
|     dst    1819     210       0       0
|     any     130      44      28      26
|      nc      50      12       1       0
|     s+d       0       1       0       0
+----------------------------------------------------------------------------

+-----------------------[detection-filter-config]------------------------------
| memory-cap : 1048576 bytes
+-----------------------[detection-filter-rules]-------------------------------
-------------------------------------------------------------------------------

+-----------------------[rate-filter-config]-----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[rate-filter-rules]------------------------------------
| none
-------------------------------------------------------------------------------

+-----------------------[event-filter-config]----------------------------------
| memory-cap : 1048576 bytes
+-----------------------[event-filter-global]----------------------------------
+-----------------------[event-filter-local]-----------------------------------
| none
+-----------------------[suppression]------------------------------------------
| none
-------------------------------------------------------------------------------
Rule application order:
activation->dynamic->pass->drop->sdrop->reject->alert->log
Verifying Preprocessor Configurations!
ICMP tracking disabled, no ICMP sessions allocated
IP tracking disabled, no IP sessions allocated
WARNING: flowbits key 'file.wma' is set but not ever checked.
WARNING: flowbits key 'file.wmp_playlist' is set but not ever checked.
WARNING: flowbits key 'tls.deflate' is set but not ever checked.
WARNING: flowbits key 'file.maplet.bin' is set but not ever checked.
WARNING: flowbits key 'file.maplet' is set but not ever checked.
WARNING: flowbits key 'file.svg' is checked but not ever set.
118 out of 1024 flowbits in use.

[ Port Based Pattern Matching Memory ]
+- [ Aho-Corasick Summary ] -------------------------------------
| Storage Format    : Full-Q
| Finite Automaton  : DFA
| Alphabet Size     : 256 Chars
| Sizeof State      : Variable (1,2,4 bytes)
| Instances         : 150
|     1 byte states : 137
|     2 byte states : 13
|     4 byte states : 0
| Characters        : 65924
| States            : 51762
| Transitions       : 5116509
| State Density     : 38.6%
| Patterns          : 3923
| Match States      : 3795
| Memory (MB)       : 25.72
|   Patterns        : 0.31
|   Match Lists     : 0.46
|   DFA
|     1 byte states : 0.87
|     2 byte states : 23.93
|     4 byte states : 0.00
+----------------------------------------------------------------
[ Number of patterns truncated to 20 bytes: 396 ]
pcap DAQ configured to passive.
Acquiring network traffic from "kistap1".
Reload thread starting...
Reload thread started, thread 0xa73f3b40 (2808)
ERROR: Cannot decode data link type 105
Fatal Error, Quitting..

-- 
*
*
*


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