[29596] in bugtraq
@(#)Mordred Labs advisory - Integer overflow in PHP array_pad() function
daemon@ATHENA.MIT.EDU (Sir Mordred)
Wed Apr 2 16:14:26 2003
Message-ID: <3e896ff3.83c32233@s-mail.com>
Date: Tue, 01 Apr 2003 10:54:43 +0000
From: Sir Mordred <mordred@s-mail.com>
To: bugtraq@securityfocus.com
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//@(#) Mordred Security Labs advisory
Release date: April 1, 2003
Name: Integer overflow in PHP array_pad() function
Versions affected: all versions
Risk: average
Author: Sir Mordred (mordred@s-mail.com)
I. Description:
PHP is a widely-used general-purpose scripting language that is
especially suited for Web development and can be embedded into HTML.
Please visit http://www.php.net for more information about PHP.
II. Details:
The function array_pad(array input, int pad_size, mixed pad_value) returns
a copy
of the input padded to size specified by pad_size with pad_value.
Unfortunately the implementation of this function suffers from an integer
overflow caused by
a very long second argument and could allow a local/remote attacker in the
worst case
to gain control over the web server.
The following short script will cause a httpd child to die:
$ cat t.php
<?php
array_pad(array(1,2,3), 0x40000003, "pad");
?>
III. Platforms tested
Linux 2.4 with Apache 1.3.27 / PHP 4.3.1
IV. Vendor response
Vendor has been contacted.
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