MySQL Server COM_CHANGE_USER Command Security Bypass

This script is Copyright (C) 2013 Tenable Network Security, Inc.


Synopsis :

The remote database server may be affected by a security bypass
vulnerability.

Description :

The installed version of MySQL may be affected by a security bypass
vulnerability because the salt used during password validation does not
change when switching users with the 'COM_CHANGE_USER' command.
Additionally, the connection is not reset when invalid credentials are
submitted. Normally, when a connection is initiated and invalid
credentials are submitted, the connection is terminated, which slows
brute-force attempts substantially.

See also :

http://seclists.org/fulldisclosure/2012/Dec/58

Solution :

There is no solution at this time.

Risk factor :

Medium / CVSS Base Score : 4.0
(CVSS2#AV:N/AC:L/Au:S/C:P/I:N/A:N)
CVSS Temporal Score : 3.5
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : false

Family: Databases

Nessus Plugin ID: 71116 ()

Bugtraq ID: 56837

CVE ID: CVE-2012-5627