Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 2706] New: CFM - Incorrect parsing of Test TLV

[bugzilla-daemon@xxxxxxxxxxxxx]

https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2706

           Summary: CFM - Incorrect parsing of Test TLV
           Product: Wireshark
           Version: 0.99.7
          Platform: PC
        OS/Version: Red Hat
            Status: NEW
          Severity: Minor
          Priority: Low
         Component: Wireshark
        AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
        ReportedBy: ksriram29@xxxxxxxxx


Build Information:
Version 0.99.7

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+ 2.4.13, with GLib 2.4.7, with libpcap 0.8.3, with libz
1.2.1.2, without libpcre, without SMI, without ADNS, without Lua, with GnuTLS
1.0.20, with Gcrypt 1.2.0, with MIT Kerberos, without PortAudio, without
AirPcap.
NOTE: this build doesn't support the "matches" operator for Wireshark filter
syntax.

Running on Linux 2.6.9-11.ELsmp, with libpcap version 0.8.3.

Built using gcc 3.4.3 20050227 (Red Hat 3.4.3-22.1).
--
The parsing of CFM (802.1ag / ITU-T Y.1731) Test TLV is incorrect. As per the
recommendation the test tlv length specifies the value field containing the
test pattern and CRC-32. But wireshark considers the pattern type field (1
byte) as part of the TLV length. 

Attachment : test_tlv (capture file)


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