Drupal 7.x Search Module Path Disclosure

`Drupal 7.x Search Module - Full Path Disclosure  
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Summary  
  
Full path disclosure due to insufficient input validation in the search module.  
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Description  
  
Performing a search with the "keys" parameter set as an array, an error message shows the full path of the Drupal installation, leading to possible further attacks.  
For the error messages to be displayed, php.ini's display_errors must be On.  
Authentication: Not Needed  
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Mitigation  
  
Correct input validation for the "key" parameters  
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Exploit PoC  
  
example.com/?q=search&keys[]=securitate.md  
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Affected Versions  
  
Versions 7 < 7.12 are affected.  
Not tested on 6.  
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Credits  
  
Ursu Mihail [ http://securitate.md ]  
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Disclosure Timeline  
  
Reported to vendor on 1 Mar 2012.  
Response from vendor:  
Disclosure of the path is not considered a security risk.  
Drupal has a configuration setting which allows PHP warnings to be printed to the screen for debugging purposes... For production websites, it is a good idea to turn this off, and the messages will not be displayed.  
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Comments  
  
Unfortunately for them, many sites display errors in production.  
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