Internal Server Error

[ms91]

Buonasera a tutti!
Ho realizzato un sito in drupal. Per un problema realtivo al cms ho accidentalmente manipolato i permessi dei file di configurazione del server.
Ora una volta che tento di accedere all'indirizzo del mio sito mi appare il seguente messaggio di errore:

The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, email@email.it and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

Ho controllato il file error_log e vi riporto le ultime righe:

[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] SoftException in Application.cpp:564: Directory "/var/www/vhosts/miositot/httpdocs" is writeable by group, referer: http://miosito/node/user/password?name=RxYNIzcjyL
[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] Premature end of script headers: index.php, referer: http://miosito/node/user/password?name=RxYNIzcjyL
[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] File does not exist: /var/www/vhosts/miosito/error_docs/internal_server_error.html, referer: http://miosito/node/user/password?name=RxYNIzcjyL
[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] SoftException in Application.cpp:564: Directory "/var/www/vhosts/miosito/httpdocs" is writeable by group, referer: http://miosito/
[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] Premature end of script headers: index.php, referer: http://miosito/
[Fri Dec 19 23:29:18 2014] [error] [client 195.211.155.143] File does not exist: /var/www/vhosts/miosito/error_docs/internal_server_error.html, referer: http://miosito/
[Fri Dec 19 23:31:53 2014] [error] [client 95.210.107.71] SoftException in Application.cpp:564: Directory "/var/www/vhosts/miosito/httpdocs" is writeable by group
[Fri Dec 19 23:31:53 2014] [error] [client 95.210.107.71] Premature end of script headers: index.php
[Fri Dec 19 23:31:53 2014] [error] [client 95.210.107.71] File does not exist: /var/www/vhosts/miosito/error_docs/internal_server_error.html

Come posso rimediare?
Vi ringrazio in anticipo!

[Xlogic]

Ciao, controlla i permessi dei files, qualsiasi files o cartella che hanno autorizzazioni superiore a 755 possono generare l’errore interno del server. Per risolvere il problema, ti consiglio di cambiare i permessi dei files in 644 e delle cartelle in 755.