Wireshark-bugs: [Wireshark-bugs] [Bug 6704] New: DNS KEY RDATA contains an extra "Key id" field

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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Fri, 30 Dec 2011 11:01:03 -0800 (PST)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6704

           Summary: DNS KEY RDATA contains an extra "Key id" field
           Product: Wireshark
           Version: 1.4.4
          Platform: x86-64
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: boaz.brickner@xxxxxxxxx


Created an attachment (id=7633)
 --> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=7633)
A sample of DNS packet with KEY RDATA

Build Information:
Version 1.4.4 (SVN Rev 36110 from /trunk-1.4)

Copyright 1998-2011 Gerald Combs <gerald@xxxxxxxxxxxxx> and contributors.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled (64-bit) with GTK+ 2.16.6, with GLib 2.22.4, with WinPcap (version
unknown), with libz 1.2.3, without POSIX capabilities, without libpcre, without
SMI, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.8.5, with
Gcrypt 1.4.5, without Kerberos, with GeoIP, with PortAudio V19-devel (built Mar 
1 2011), with AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with WinPcap version
4.1.2 (packet.dll version 4.1.0.2001), based on libpcap version 1.0 branch
1_0_rel0b (20091008), GnuTLS 2.8.5, Gcrypt 1.4.5, without AirPcap.

Built using Microsoft Visual C++ 9.0 build 21022

Wireshark is Open Source Software released under the GNU General Public
License.

Check the man page and http://www.wireshark.org for more information.
--
Hi!

Looking at the attached pcap file you can see a DNS packet with 5 Answer
records.
The 4th Answer record is of type KEY.
In Wireshark you can see there's a "Key id" field for this Answer record.
This field is not defined in RFC 4034 (http://www.ietf.org/rfc/rfc4034.txt).
Wireshark also doesn't show where is the value for this field comes from.

I have no idea where did this field came from and I believe it should be
removed.

Thanks,

Boaz.

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