Wireshark-bugs: [Wireshark-bugs] [Bug 1920] New: Bug in Sigcomp decoding, STATE-ACCESS instructi

Date: Thu, 18 Oct 2007 11:24:07 +0000 (GMT)
http://bugs.wireshark.org/bugzilla/show_bug.cgi?id=1920

           Summary: Bug in Sigcomp decoding, STATE-ACCESS instruction
           Product: Wireshark
           Version: 0.99.5
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: Medium
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: rgarcia2@xxxxxxxxxxxx


Build Information:
Version 0.99.5 (SVN Rev 20677)

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+ 2.10.7, with GLib 2.12.7, with WinPcap (version unknown),
with libz 1.2.3, with libpcre 6.4, with Net-SNMP 5.4, 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 3.1
(packet.dll version 3, 1, 0, 27), based on libpcap version 0.9[.x], without
AirPcap.

Built using Microsoft Visual C++ 6.0 build 8804

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

Check the man page and http://www.wireshark.org for more information.
--
According to RFC 3320 section 9.4.5, if a value of zero is received as
state_length argument on STATE-ACCESS instruction, the actual length is to be
obtained from the state specification.

Instead, when Wireshark tries to decode a message containing a Bytecode using
state-access with a 0 state_length (to access the whole static SIP dictionary),
zero bytes are copied from the state and so, message decoding fails.


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