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e9f783fcdd
For rationale, see #6787 Extensions migrated in part 3: * ftp * gmp * iconv * opcache * shmop
42 lines
845 B
PHP
42 lines
845 B
PHP
--TEST--
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Bug #70284 (Use after free vulnerability in unserialize() with GMP)
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--EXTENSIONS--
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gmp
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--FILE--
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<?php
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$inner = 'r:2;a:1:{i:0;a:1:{i:0;r:4;}}';
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$exploit = 'a:2:{i:0;s:1:"1";i:1;C:3:"GMP":'.strlen($inner).':{'.$inner.'}}';
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$data = unserialize($exploit);
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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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var_dump($data);
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function ptr2str($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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Fatal error: Uncaught Exception: Could not unserialize number in %sbug70284.php:6
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Stack trace:
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#0 %sbug70284.php(6): unserialize('%s')
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#1 {main}
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thrown in %sbug70284.php on line 6
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