Wireshark-bugs: [Wireshark-bugs] [Bug 7938] New: IPv6 Option Pad1 Incorrect dissection

Date: Tue, 30 Oct 2012 19:54:16 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7938

           Summary: IPv6 Option Pad1 Incorrect dissection
           Product: Wireshark
           Version: 1.8.3
          Platform: x86-64
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Dissection engine (libwireshark)
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: vinsworldcom@xxxxxxxxx


Created attachment 9450
  --> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=9450
Above image is 1.6.1 correct and bottom image is 1.8.3 incorrect

Build Information:
wireshark 1.8.3 (SVN Rev 45256 from /trunk-1.8)

Copyright 1998-2012 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+ 2.24.10, with Cairo 1.10.2, with Pango 1.30.0, with
GLib 2.32.2, with WinPcap (4_1_2), with libz 1.2.5, without POSIX capabilities,
with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS
2.12.18, with Gcrypt 1.4.6, without Kerberos, with GeoIP, with PortAudio
V19-devel (built Oct  2 2012), 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 2.12.18, Gcrypt 1.4.6, without AirPcap.

Built using Microsoft Visual C++ 10.0 build 40219
--
Wireshark 1.8.3 does not decode the IPv6 Option Pad1 (RFC 2460 Section 4.2)
correctly.  It is supposed to be a 1-byte field, but Wireshark is interpreting
it as two-bytes.

Wireshark 1.6.1 decodes it correctly.

I've attached screenshots of both 1.6.1 (correct) and 1.8.3 (incorrect).

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