[29454] in bugtraq
@(#)Mordred Labs advisory - Integer overflow in PHP socket_iovec_alloc() function
daemon@ATHENA.MIT.EDU (Sir Mordred)
Tue Mar 25 11:52:19 2003
Message-ID: <3e80685f.f0506f17@s-mail.com>
Date: Tue, 25 Mar 2003 14:31:59 +0000
From: Sir Mordred <mordred@s-mail.com>
To: bugtraq@securityfocus.com
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//@(#) Mordred Security Labs advisory
Release date: March 25, 2003
Name: Integer overflow in PHP socket_iovec_alloc() function
Versions affected: < 4.3.2
Conditions: PHP must be compiled with --enable-sockets option, which is
turned off by default
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.
The PHP socket extension implements a low-level interface to the socket
communication functions based on the popular BSD sockets, providing the
possibility to act as a socket server as well as a client...
To enable this extenstion PHP should be compiled with --enable-sockets
option.
II. Details:
There exists an integer overflow in socket_iovec_alloc() function.
When requestiong the following php script, a httpd child will die with
the error message: child pid <pidnum> exit signal Segmentation fault (11)
$ cat t.php
<?php
socket_iovec_alloc(0x20000000);
?>
III. Platforms tested
Linux 2.4 with Apache 1.3.27 / PHP 4.3.1
III. Workaround
Don't use the sockets extension.
IV. Vendor response
Vendor notified, issue will be fixed in PHP 4.3.2.
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