Wireshark · Wireshark-bugs: [Wireshark-bugs] [Bug 10351] New: MySQL: decoding COM_CHANGE_USER from new clients fails

[bugzilla-daemon@xxxxxxxxxxxxx]

Bug ID	10351
Summary	MySQL: decoding COM_CHANGE_USER from new clients fails
Classification	Unclassified
Product	Wireshark
Version	Git
Hardware	All
OS	All
Status	UNCONFIRMED
Severity	Minor
Priority	Low
Component	Dissection engine (libwireshark)
Assignee	bugzilla-admin@wireshark.org
Reporter	wireshark@myname.nl

Created attachment 12963 [details]
sample packets

Build Information:
Paste the COMPLETE build information from "Help->About Wireshark", "wireshark
-v", or "tshark -v".
--
Wireshark fails to properly decode COM_CHANGE_USER from newer (5.6+) clients.

This is because:
1. The auth-response is <len><authresponse> if the SECURE_CONNECTION capability
is set (instead of <authresponse><NUL>
2. The packet might have:
 - Connection attributes
 - Authentication plugin data

--- Python code to send a COM_CHANGE_USER packet -------
#!/usr/bin/python
import mysql.connector
a = mysql.connector.connect(user='msandbox',password='msandbox',port=5619)
a.cmd_change_user(username='root',password='msandbox')
---------------------------------------------------------

http://dev.mysql.com/doc/internals/en/com-change-user.html

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