IPv6 and proxy server IP-based authentication rule circumvention
A vulnerability was discovered where, under certain circumstances, it may be possible to circumvent the phpMyAdmin IP-based authentication rules.
When phpMyAdmin is used with IPv6 in a proxy server environment, and the proxy server is in the allowed range but the attacking computer is not allowed, this vulnerability can allow the attacking computer to connect despite the IP rules.
We consider this vulnerability to be serious
* The phpMyAdmin installation must be running with IP-based allow/deny rules * The phpMyAdmin installation must be running behind a proxy server (or proxy servers) where the proxy server is "allowed" and the attacker is "denied" * The connection between the proxy server and phpMyAdmin must be via IPv6
All 4.6.x versions (prior to 4.6.4), 4.4.x versions (prior to 188.8.131.52), and 4.0.x versions (prior to 184.108.40.206) are affected
Upgrade to phpMyAdmin 4.6.4, 220.127.116.11, or 18.104.22.168 or newer or apply patch listed below.
Thanks to Emanuel Bronshtein @e3amn2l for reporting this vulnerability.
Assigned CVE ids: CVE-2016-6624
CWE ids: CWE-661
The following commits have been made on the 4.0 branch to fix this issue:
The following commits have been made on the 4.4 branch to fix this issue:
The following commits have been made on the 4.6 branch to fix this issue:
For further information and in case of questions, please contact the phpMyAdmin team. Our website is phpmyadmin.net.