Wireshark-bugs: [Wireshark-bugs] [Bug 10960] New: DNS LOC data parsed as unknown data

Date: Sat, 14 Feb 2015 09:38:09 +0000
Bug ID 10960
Summary DNS LOC data parsed as unknown data
Product Wireshark
Version 1.12.3
Hardware x86-64
OS Windows 7
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee [email protected]
Reporter [email protected]

Created attachment 13447 [details]
DNS LOC unknown data

Build Information:
Version 1.12.3 (v1.12.3-0-gbb3e9a0 from master-1.12)

Copyright 1998-2015 Gerald Combs <[email protected]> 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+ 2.24.23, with Cairo 1.10.2, with Pango 1.34.0, with
GLib 2.38.0, with WinPcap (4_1_3), with libz 1.2.5, with SMI 0.4.8, with c-ares
1.9.1, with Lua 5.2, without Python, with GnuTLS 3.2.15, with Gcrypt 1.6.2,
without Kerberos, with GeoIP, with PortAudio V19-devel (built Jan  7 2015),
with
AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with WinPcap version
4.1.3 (packet.dll version 4.1.0.2980), based on libpcap version 1.0 branch
1_0_rel0b (20091008), GnuTLS 3.2.15, Gcrypt 1.6.2, without AirPcap.
        Intel(R) Core(TM) i5-3550 CPU @ 3.30GHz, with 16345MB of physical
memory.


Built using Microsoft Visual C++ 10.0 build 40219

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

Check the man page and http://www.wireshark.org for more information.
--
Discovered while working on Pcap.Net (http://pcapdot.net).

In the first attached pcap file there's a single DNS packet.
In the DNS Authoritative RRs, the 4th (and last) RR is a LOC RR.
The LOC RR data is parsed as unknown data (after the version field).

In the second attached pcap file, there's a single DNS packet.
In the DNS Additional RRs, the 3rd RR is a LOC RR.
The LOC RR data is parsed fine, without treating it as unknown data.

Why is the second packet parsed ok and the first isn't?


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