Wireshark-bugs: [Wireshark-bugs] [Bug 6230] New: Large JPEG files are not dissected
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Wed, 10 Aug 2011 06:02:28 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6230

           Summary: Large JPEG files are not dissected
           Product: Wireshark
           Version: 1.6.1
          Platform: x86-64
        OS/Version: Windows Vista
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: DXDragon@xxxxxxxxx


Build Information:
Version 1.6.1 (SVN Rev 38096 from /trunk-1.6)

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+ 2.22.1, with GLib 2.26.1, with WinPcap (version
unknown), with libz 1.2.5, without POSIX capabilities, without libpcre, without
SMI, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.10.3, with
Gcrypt 1.4.6, without Kerberos, with GeoIP, with PortAudio V19-devel (built Jul
18 2011), with AirPcap.

Running on 64-bit Windows Vista Service Pack 2, build 6002, 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 2.10.3, Gcrypt 1.4.6, 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.

--
When opening JPEG files larger than 65535 bytes, the dissection tree looks like
this:

+ Frame 1: 763865 bytes on wire (6110920 bits), 65535 bytes captured (524280
bits)
  [Packet size limited during capture: JFIF (JPEG) image truncated]

Consequently, file structure can't be viewed.

For the record, Wireshark 1.4.7 also asserts that only 65535 bytes are
captured, but it successfully dissects the available portion of the file.

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