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45 lines
1.0 KiB
PHP
45 lines
1.0 KiB
PHP
--TEST--
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Bug #72562: Use After Free in unserialize() with Unexpected Session Deserialization
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--SKIPIF--
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<?php include('skipif.inc'); ?>
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--FILE--
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<?php
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ini_set('session.serialize_handler', 'php_binary');
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session_start();
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$sess = "\x1xi:1;\x2y";
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session_decode($sess);
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$uns_1 = '{';
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$out_1[] = unserialize($uns_1);
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unset($out_1);
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$fakezval = ptr2str(1122334455);
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$fakezval .= ptr2str(0);
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$fakezval .= "\x00\x00\x00\x00";
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$fakezval .= "\x01";
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$fakezval .= "\x00";
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$fakezval .= "\x00\x00";
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for ($i = 0; $i < 5; $i++) {
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$v[$i] = $fakezval.$i;
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}
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$uns_2 = 'R:2;';
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$out_2 = unserialize($uns_2);
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var_dump($out_2);
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function ptr2str($ptr)
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{
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$out = '';
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for ($i = 0; $i < 8; $i++) {
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$out .= chr($ptr & 0xff);
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$ptr >>= 8;
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}
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return $out;
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}
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?>
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--EXPECTF--
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Warning: session_decode(): Failed to decode session object. Session has been destroyed in %s%ebug72562.php on line %d
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Notice: unserialize(): Error at offset 0 of 1 bytes in %s%ebug72562.php on line %d
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Notice: unserialize(): Error at offset 4 of 4 bytes in %s%ebug72562.php on line %d
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bool(false)
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