| Bug ID |
8629
|
| Summary |
bad tcp checksum not detected
|
| Classification |
Unclassified
|
| Product |
Wireshark
|
| Version |
1.8.6
|
| Hardware |
x86
|
| OS |
Windows 7
|
| Status |
UNCONFIRMED
|
| Severity |
Major
|
| Priority |
Low
|
| Component |
Dissection engine (libwireshark)
|
| Assignee |
[email protected]
|
| Reporter |
[email protected]
|
Created attachment 10718 [details]
packet with bad checksum
Build Information:
Version 1.8.6 (SVN Rev 48142 from /trunk-1.8)
Copyright 1998-2013 Gerald Combs <[email protected]> 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 (64-bit) with GTK+ 2.24.14, with Cairo 1.10.2, with Pango 1.30.1, with
GLib 2.34.1, with WinPcap (4_1_2), 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
2.12.18, with Gcrypt 1.4.6, without Kerberos, with GeoIP, with PortAudio
V19-devel (built Mar 6 2013), with AirPcap.
Running on 64-bit Windows 7 Service Pack 1, build 7601, 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 2.12.18, Gcrypt 1.4.6, without AirPcap.
Built using Microsoft Visual C++ 10.0 build 40219
Wireshark is Open Source Software released under the GNU General Public
License.
Check the man page and http://www.wireshark.org for more information.
--
Packet was captured with Cisco NAM appliance, hence no checksum offloading. Ran
the same packet through Wireshark and tcpdump. TCP checksum validation results
differed as follows.
Wireshark -- Bad Checksum: False
tcpdump -- 00:45:32.590943 IP (tos 0x0, ttl 50, id 183, offset 0, flags [DF],
proto TCP (6), length 1420)
service.ariba.com.https > 10.31.46.245.54645: Flags [.], cksum 0x0000
(incorrect -> 0xfffe), seq 1225261072:1225262452, ack 3059077717, win 8295,
length 1380
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