Buffer overflow in PHP "wordwrap" function

From: David F. Skoll (dfsat_private)
Date: Fri Dec 27 2002 - 13:43:44 PST

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There is a buffer overflow in PHP's built-in "wordwrap" function
for PHP versions greater than 4.1.2 and less than 4.3.0.

Please see http://bugs.php.net/bug.php?id=20927 for details.

If you use the wordwrap() function on user-supplied input, a
specially-crafted input can overflow the allocated buffer and
overwrite the heap.  Exploit looks very difficult, but still
theoretically possible.

Status:

Bug cause discovered: 10 Dec 2002
PHP team notified:    10 Dec 2002
Bug fixed in CVS:     12 Dec 2002
PHP 4.3.0 released:   27 Dec 2002

Kudos to the PHP team for their extremely rapid reaction.

Recommendations:

Don't upgrade from 4.1.2 if you are certain there are no security problems
with your 4.1.2 setup and you may be vulnerable to the wordwrap() bug.

Otherwise, upgrade to 4.3.0

- --
David F. Skoll

Roaring Penguin Software Inc. | http://www.roaringpenguin.com
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