Wireshark-bugs: [Wireshark-bugs] [Bug 6972] New: ISAKMP dissector bug: failed assertion proto.c:
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From: bugzilla-daemon@xxxxxxxxxxxxx
Date: Tue, 20 Mar 2012 12:11:04 -0700 (PDT)
https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6972

           Summary: ISAKMP dissector bug: failed assertion proto.c:2957:
           Product: Wireshark
           Version: 1.7.x (Experimental)
          Platform: x86
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: Low
         Component: Wireshark
        AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
        ReportedBy: amdeich@xxxxxxxxx


Created attachment 8053
  --> https://bugs.wireshark.org/bugzilla/attachment.cgi?id=8053
Sample capture, where "malformed packet" reported

Build Information:
Version 1.7.0 (SVN Rev 39768 from /trunk)
Expert Info (Error/Malformed): proto.c:2957: failed assertion Compiled (32-bit)
with GTK+ 2.22.1, with Cairo 1.10.2, with Pango 1.28.3, with
GLib 2.26.1, with WinPcap (version unknown), with libz 1.2.5, without POSIX
capabilities, with SMI 0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python,
with GnuTLS 2.10.3, with Gcrypt 1.4.6, with MIT Kerberos, with GeoIP, with
PortAudio V19-devel (built Nov  8 2011), with AirPcap.

Running on Windows XP Service Pack 3, build 2600, 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 complains to "[Dissector bug, protocol ISAKMP: proto.c:2957: failed
assertion "DISSECTOR_ASSERT_NOT_REACHED"]", when browsing seems to be fine
first IKEv1 Main Mode packet.

The same packed, when prowsing in 1.6.0 or 1.6.5 resuilts in complaining to 
"Expert Info (Error/Malformed): Malformed Packet (Exception occurred)"
(without referencing to dissector bug).

Please find sample capture in attachement.

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