Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 2135] New: Incorrectly assumed minimum length of UDHL in packet-gsm_sms.c

[bugzilla-daemon@xxxxxxxxxxxxx]

http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2135

           Summary: Incorrectly assumed minimum length of UDHL in packet-
                    gsm_sms.c
           Product: Wireshark
           Version: SVN
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Minor
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: sarkar.abhik@xxxxxxxxx


Build Information:
Version 0.99.8-AS (SVN Rev 23941)

Copyright 1998-2007 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 with GTK+ 2.12.3, with GLib 2.14.4, with WinPcap (version unknown),
with libz 1.2.3, with libpcre 6.4, with SMI 0.4.5, with ADNS, with Lua 5.1,
with
GnuTLS 1.6.1, with Gcrypt 1.2.3, with MIT Kerberos, with PortAudio PortAudio
V19-devel, with AirPcap.

Running on Windows XP Service Pack 2, build 2600, with WinPcap version 4.0.1
(packet.dll version 4.0.0.901), based on libpcap version 0.9.5, without
AirPcap.

Built using Microsoft Visual C++ 8.0 build 50727

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

Check the man page and http://www.wireshark.org for more information.
--
In packet-gsm_sms.c,
in function dis_field_ud_iei, it is assumed that the UDHL must be greater than
2 (because it is expected that IEIa and IEIDLa will be one byte each and the
rest will be IEIDa). 

However, there are some cases in which UDHL can be 2. For example, in 3GPP
23.048.


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