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Uname:Linux wp 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023 x86_64

Base Dir : /var/www/eduesan

User : www-data

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Server IP : 202.131.237.196 / Your IP : 216.73.216.192
Web Server : nginx/1.14.0
System : Linux wp 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023 x86_64
User : www-data ( 33)
PHP Version : 7.2.24-0ubuntu0.18.04.17
Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,
MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : ON | Sudo : ON | Pkexec : ON
Directory : /www/server/php/72/src/ext/snmp/tests/

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Current File : /www/server/php/72/src/ext/snmp/tests/bug72479.phpt

--TEST--
Bug #72479: Use After Free Vulnerability in SNMP with GC and unserialize()
--SKIPIF--
<?php
require_once(dirname(__FILE__).'/skipif.inc');
?>
--FILE--
<?php
$arr = [1, [1, 2, 3, 4, 5], 3, 4, 5];
$poc = 'a:3:{i:1;N;i:2;O:4:"snmp":1:{s:11:"quick_print";'.serialize($arr).'}i:1;R:7;}';
$out = unserialize($poc);
gc_collect_cycles();
$fakezval = ptr2str(1122334455);
$fakezval .= ptr2str(0);
$fakezval .= "\x00\x00\x00\x00";
$fakezval .= "\x01";
$fakezval .= "\x00";
$fakezval .= "\x00\x00";
for ($i = 0; $i < 5; $i++) {
    $v[$i] = $fakezval.$i;
}
var_dump($out[1]);

function ptr2str($ptr)
{
    $out = '';
    for ($i = 0; $i < 8; $i++) {
        $out .= chr($ptr & 0xff);
        $ptr >>= 8;
    }
    return $out;
}
?>
--EXPECT--
int(1)

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