UDP destination port 0 probes

["Keith T. Morgan" <keith.morgan () terradon com>]

We had an incident of several hundred of packets like the one below
coming in, nearly simultaneously from multiple sources.  My guess is
that most of the sources are spoofed.  It swept several class C networks
in a few minutes.  Targets appear to be valid name servers.  The same
spoofed IP's were used as sources on each scanned class C.

Is this known traffic of some sort?  Is there a new worm running around?
Have I missed something everyone else already knows about?

Generated by ACID v0.9.6b23 on Mon, 17 Nov 2003 21:04:14 -0500

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#(3 - 356) [2003-11-17 19:53:50] nessus[cve/CVE-1999-0675]
[icat/CVE-1999-0675] [snort/525]  BAD-TRAFFIC udp port 0 traffic

IPv4: 66.119.33.133 -> X.X.X.112
      hlen=5 TOS=0 dlen=64 ID=45750 flags=0 offset=0 TTL=1 chksum=25982
UDP:  port=53 -> dport: 0 len=44
Payload:  length = 36

000 : B2 B6 80 81 00 00 00 00 00 00 00 00 00 00 00 00   ................
010 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   ................
020 : 00 00 00 00                                       ....
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