Wireshark-bugs: [Wireshark-bugs] [Bug 10578] New: IPv6 Mobility Option Mobile Node Link Layer Id
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Thu, 16 Oct 2014 20:05:11 +0000
Bug ID 10578
Summary IPv6 Mobility Option Mobile Node Link Layer Identifier Link-layer Identifier field is read beyond the option data
Product Wireshark
Version 1.12.1
Hardware x86-64
OS Windows 7
Status UNCONFIRMED
Severity Normal
Priority Low
Component Dissection engine (libwireshark)
Assignee bugzilla-admin@wireshark.org
Reporter boaz.brickner@gmail.com 

Created attachment 13177 [details]
IPv6 packet with Mobile Node Link Layer Identifier mobility option

Build Information:
Version 1.12.1 (v1.12.1-0-g01b65bf from master-1.12)

Copyright 1998-2014 Gerald Combs <gerald@wireshark.org> 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 3.1.22, with Gcrypt 1.6.0,
without Kerberos, with GeoIP, with PortAudio V19-devel (built Sep 16 2014),
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 3.1.22, Gcrypt 1.6.0, 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).

This is very similar to
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=10577

In the attached pcap file, there's a single IPv6 packet with Mobile Node Link
Layer Identifier mobility option.
The option's data length is 9 but and since the Reserved field takes 2 bytes,
the Link Layer Identifier field should take 7 bytes.
However, the Link Layer Identifier field is read until the end of the packet,
which is 519 bytes.

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