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