https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6342
Summary: MySQL’s response for a “prepare statement” command not
supported by the MySQL dissector
Product: Wireshark
Version: SVN
Platform: All
OS/Version: All
Status: NEW
Severity: Normal
Priority: Low
Component: TShark
AssignedTo: bugzilla-admin@xxxxxxxxxxxxx
ReportedBy: pmderodat@xxxxxxxx
Created an attachment (id=7016)
--> (https://bugs.wireshark.org/bugzilla/attachment.cgi?id=7016)
Capture of a MySQL connection using prepared statements
Build Information:
wireshark 1.7.0 (SVN Rev 38992 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+ 2.24.4, with Cairo 1.10.2, with Pango 1.28.4, with
GLib 2.28.6, with libpcap 1.1.1, with libz 1.2.3.4, with POSIX capabilities
(Linux), with threads support, with SMI 0.4.8, with c-ares 1.7.3, with Lua 5.1,
with Python 2.7.1+, with GnuTLS 2.8.6, with Gcrypt 1.4.6, with MIT Kerberos,
with GeoIP, with PortAudio V19-devel (built Mar 18 2011 15:44:36), without
AirPcap.
Running on Linux 2.6.38-8-generic, with locale en_US.UTF-8, with libpcap
version
1.1.1, with libz 1.2.3.4, GnuTLS 2.8.6, Gcrypt 1.4.6.
Built using gcc 4.5.2.
--
The MySQL’s dissector do not fully support the server response packet for a
“prepare statement” command (see
http://forge.mysql.com/wiki/MySQL_Internals_ClientServer_Protocol#OK_for_Prepared_Statement_Initialization_Packet).
I’ve fixed it so it can analyze the following information:
– the ID of the created prepared statement
– the number of columns in the result set
– the number of parameters in the query
– the warning count
I’ve also fixed the state machine so that after having received this OK packet,
the dissector is expecting the correct types for the next packets:
– field packets + EOF packet if the number of parameters is > 0
– the same if the number of columns is > 0.
With my changes to the MySQL’s dissector, I’ve run successfully 90000
iterations with the fuzz-testing tool (tools/fuzz-test.sh) using the attached
capture.
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