Snort mailing list archives
DNS Help/ SID 1948
From: "Everist, Benjamin S. (NASWI)" <EveristB () naswi navy mil>
Date: Wed, 7 May 2003 11:45:27 -0700
Is the alert below really a DNS Zone transfer? If not, what is it? ---------------------------------------------------------------------------- -- #(1 - 324871) [2003-05-06 09:15:04] [arachNIDS/212] [cve/CAN-1999-0532] [icat/CAN-1999-0532] [snort/1948] DNS zone transfer UDP IPv4: 207.115.64.2 -> my.home.net hlen=5 TOS=0 dlen=170 ID=0 flags=0 offset=0 TTL=47 chksum=51810 UDP: port=53 -> dport: 53 len=150 Payload: length = 142 000 : 54 50 80 00 00 01 00 00 00 02 00 03 03 31 31 36 TP...........116 010 : 06 31 31 32 2F 32 38 03 31 33 35 02 31 38 02 31 .112/28.135.18.1 020 : 32 07 69 6E 2D 61 64 64 72 04 61 72 70 61 00 00 2.in-addr.arpa.. 030 : 0C 00 01 C0 10 00 02 00 01 **00 00 FC** DB 00 12 03 ................ 040 : 6E 73 32 08 69 73 6F 6D 65 64 69 61 03 63 6F 6D ns2.isomedia.com 050 : 00 C0 10 00 02 00 01 **00 00 FC** DB 00 06 03 6E 73 ..............ns 060 : 31 C0 43 C0 5D 00 01 00 01 00 00 2A 30 00 04 CF 1.C.]......*0... 070 : 73 40 02 C0 3F 00 01 00 01 00 00 2A 30 00 04 CF s@..?......*0... 080 : 73 40 03 00 00 29 10 00 00 00 80 00 00 00 s@...)........ and here's the sig that triggered it: alert udp $EXTERNAL_NET any -> $HOME_NET 53 (msg:"DNS zone transfer UDP"; content: "|00 00 FC|"; offset:14; reference:cve,CAN-1999-0532; reference:arachnids,212; classtype:attempted-recon; sid:1948; rev:1;) Your thoughts are appreciated... v/r, Benjamin Everist
Current thread:
- DNS Help/ SID 1948 Everist, Benjamin S. (NASWI) (May 07)
- <Possible follow-ups>
- RE: DNS Help/ SID 1948 Vanish Pattni (DSL AK) (May 07)
- RE: DNS Help/ SID 1948 Demetri Mouratis (May 07)
- Re: DNS Help/ SID 1948 Mathias Gygax (May 07)
- RE: DNS Help/ SID 1948 Demetri Mouratis (May 07)
- RE: DNS Help/ SID 1948 Joesph Bowling (May 07)