openssl_encrypt(): Using an empty Initialization Vector (iv) is potentially insecure and not recommended error phpmyadmin

Question

I am getting this issue while opening my phpmyadmin. I haven't done anything on my server

/libraries/plugins/auth/AuthenticationCookie.class.php#744 openssl_encrypt(): Using an empty Initialization Vector (iv) is potentially insecure and not recommended Backtrace

./libraries/plugins/auth/AuthenticationCookie.class.php#744: openssl_encrypt( string 'userid', string 'AES-128-CBC', string '', integer 0, string '', ) ./libraries/plugins/auth/AuthenticationCookie.class.php#626: AuthenticationCookie->cookieEncrypt( string 'userid', string '8a782c92b7c2ca333600e3da8d629fbb', ) ./libraries/plugins/auth/AuthenticationCookie.class.php#549: AuthenticationCookie->storeUsernameCookie(string 'userid') ./libraries/common.inc.php#1037: AuthenticationCookie->storeUserCredentials() ./prefs_manage.php#12: require_once(./libraries/common.inc.php)

Answer 1

This is due to the certificate was not properly renewed in apache server. Although you can access MySql Db in your server using Sql Workbench for windows and Sequel pro for Mac or if you want to fix this issue in your server you can perform this command

sudo apache2ctl stop

to stop the service, and

sudo apache2ctl start

to start it again.

The certificate will be renewed and Issue will be fixed.