eEye Digital Security eEye Digital Security
  • Login to the eEye Business Client Portal
  • Shop for eEye Products
  • Read the eEye Blog
  • Subscribe to eEye RSS Feeds
  • Follow eEye on Twitter
  • Follow eEye of Facebook

Research > Zero-Day Tracker > 20110217

PHP grapheme_extract() NULL Pointer Dereference

Date Disclosed:

Date Patched:

The PHP Group

Affected Software:
PHP 5.3.5

PHP contains a NULL Pointer Dereference vulnerability when handling calls to the grapheme_extract() function. Successful exploitation yields a denial of service condition.


Code Execution:

Denial of service condition, causing the system to become unresponsive or crashing the vulnerable components. This vulnerability may potentially allow for the compromise of the target system.

A fix has been included in the source repository but has not been applied to the stable release yet.




  • 2.17.2011 - Public Information Released

Copyright ©1998-2011 eEye Digital Security
Permission is hereby granted for the redistribution of this alert electronically. It is not to be edited in any way without express consent of eEye. If you wish to reprint the whole or any part of this alert in any other medium excluding electronic medium, please email for permission.

The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are no warranties, implied or express, with regard to this information. In no event shall the author be liable for any direct or indirect damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk.

Next Steps

Free Trial
Test drive an eEye product
On-demand Demo
See an online product tour
One-on-one Demo
Schedule a personalized tour
Compare Products
See side-by-side features
Buy Now
Go to eEye product store
Contact | Site Map | Privacy | Website Feedback | 1.866.339.3732
© 1998 – 2012 eEye Digital Security. All rights reserved.