Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 12745] New: Checksum verification broken for ISIS LSP packets

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Bug ID	12745
Summary	Checksum verification broken for ISIS LSP packets
Product	Wireshark
Version	2.3.x (Experimental)
Hardware	x86
OS	Windows NT
Status	UNCONFIRMED
Severity	Major
Priority	Low
Component	Dissection engine (libwireshark)
Assignee	bugzilla-admin@wireshark.org
Reporter	pascal.quantin@gmail.com

Created attachment 14809 [details]
Capture file demonstrating the issue

Build Information:
Version 2.3.0 (v2.3.0rc0-300-g0ebaffe from master)

Copyright 1998-2016 Gerald Combs <gerald@wireshark.org> and contributors.
License GPLv2+: GNU GPL version 2 or later
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>
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 (64-bit) with Qt 5.6.1, with WinPcap (4_1_3), with GLib 2.42.0, with
zlib 1.2.8, with SMI 0.4.8, with c-ares 1.11.0, with Lua 5.2.4, with GnuTLS
3.2.15, with Gcrypt 1.6.2, with MIT Kerberos, with GeoIP, with QtMultimedia,
with AirPcap.

Running on 64-bit Windows 7 Service Pack 1, build 7601, with locale
French_France.1252, with WinPcap version 4.1.3 (packet.dll version 4.1.0.2980),
based on libpcap version 1.0 branch 1_0_rel0b (20091008), with GnuTLS 3.2.15,
with Gcrypt 1.6.2, with AirPcap 4.1.0 build 1622.
Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz (with SSE4.2), with 2047MB of
physical
memory.


Built using Microsoft Visual C++ 12.0 build 40629

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

Check the man page and http://www.wireshark.org for more information.
--
Since the commit of gad6fc87, the checksum computation of ISIS LSP packet is
broken: a wrong offset is given to proto_tree_add_checksum() function.

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