https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=5727
Summary: Wrong packet type association of SNMP trap after TFTP
transfer
Product: Wireshark
Version: 1.5.x (Experimental)
Platform: x86
OS/Version: Windows XP
Status: NEW
Severity: Major
Priority: Low
Component: Wireshark
AssignedTo: wireshark-bugs@xxxxxxxxxxxxx
ReportedBy: zefir.kurtisi@xxxxxxxxxxx
Created an attachment (id=5983)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=5983)
Capture of wrongly assigned SNMP trap to previous TFTP session
Build Information:
Version 1.5.0 (SVN Rev 35637 from /trunk)
Copyright 1998-2011 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 (32-bit) with GTK+ 2.16.6, with GLib 2.24.2, with WinPcap (version
unknown), with libz 1.2.3, without POSIX capabilities, without libpcre, with
SMI
0.4.8, with c-ares 1.7.1, with Lua 5.1, without Python, with GnuTLS 2.8.5, with
Gcrypt 1.4.5, with MIT Kerberos, with GeoIP, with PortAudio V19-devel (built
Jan
24 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 2.8.5, Gcrypt 1.4.5, without AirPcap.
Built using Microsoft Visual C++ 9.0 build 30729
Wireshark is Open Source Software released under the GNU General Public
License.
Check the man page and http://www.wireshark.org for more information.
--
Overview:
SNMP trap packet sent right after a successful TFTP transfer are wrongly
assigned to the previous TFTP session and interpreted as unknown TFTP opcode
packet type.
Test setup:
We are sending a configuration file to a embedded device over TFTP. Right after
the transfer a syslog message and a SNMP trap is send to the host.
In the setup we captured
* the TFTP transfer goes between device:1025 and host:3293
* the syslog between device:1024 and host:514
* the SNMP trap between device:1025 and host:162
The SNMP trap is associated to the previous TFTP session, even if the
destination port differs.
Capture is attached.
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