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Drupal 7.x Search Module Path Disclosure

Drupal 7.x Search Module Path Disclosure
Posted Mar 14, 2012
Authored by Ursu Mihail

The Search module in Drupal version 7.x suffers from a path disclosure vulnerability.

tags | exploit, info disclosure
MD5 | 389d4081c60e6d96f1d85cfe0b9a035e

Drupal 7.x Search Module Path Disclosure

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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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