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FKIE_CVE-2018-20434

Vulnerability from fkie_nvd - Published: 2019-04-24 21:29 - Updated: 2026-06-17 01:52
Severity
9.8 (Critical) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST['community'] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture&format=text&type=snmpwalk&hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling.
References
cve@mitre.orghttp://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html
cve@mitre.orghttp://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html
cve@mitre.orghttps://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharingPermissions Required, Third Party Advisory
cve@mitre.orghttps://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372dExploit, Third Party Advisory
cve@mitre.orghttps://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/Exploit, Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html
af854a3a-2127-422b-91ae-364da2661108https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharingPermissions Required, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372dExploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/Exploit, Technical Description, Third Party Advisory
Impacted products
Vendor Product Version
librenms librenms 1.46
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:librenms:librenms:1.46:*:*:*:*:*:*:*",
              "matchCriteriaId": "160112A5-16AF-441D-BE77-C6F01F90DAD0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "LibreNMS 1.46 allows remote attackers to execute arbitrary OS commands by using the $_POST[\u0027community\u0027] parameter to html/pages/addhost.inc.php during creation of a new device, and then making a /ajax_output.php?id=capture\u0026format=text\u0026type=snmpwalk\u0026hostname=localhost request that triggers html/includes/output/capture.inc.php command mishandling."
    },
    {
      "lang": "es",
      "value": "LibreNMS 1.46 permite a los atacantes remotos ejecutar comandos OS arbitrarios mediante el uso del par\u00e1metro $_POST[\u0027community\u0027] en html/pages/addhost.inc.php durante la creaci\u00f3n de un nuevo dispositivo y posteriormente haciendo una petici\u00f3n /ajax_output.php?id=capture\u0026format=text\u0026type=snmpwalk\u0026hostname=localhost que desencadene una mala gesti\u00f3n del comando html/includes/output/capture.inc.php"
    }
  ],
  "id": "CVE-2018-20434",
  "lastModified": "2026-06-17T01:52:50.273",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2019-04-24T21:29:00.400",
  "references": [
    {
      "source": "cve@mitre.org",
      "url": "http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html"
    },
    {
      "source": "cve@mitre.org",
      "url": "http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Technical Description",
        "Third Party Advisory"
      ],
      "url": "https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://packetstormsecurity.com/files/153188/LibreNMS-addhost-Command-Injection.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://packetstormsecurity.com/files/153448/LibreNMS-1.46-addhost-Remote-Code-Execution.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Permissions Required",
        "Third Party Advisory"
      ],
      "url": "https://drive.google.com/file/d/1LcGmOY8x-TG-wnNr-cM_f854kxk0etva/view?usp=sharing"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://gist.github.com/mhaskar/516df57aafd8c6e3a1d70765075d372d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Technical Description",
        "Third Party Advisory"
      ],
      "url": "https://shells.systems/librenms-v1-46-remote-code-execution-cve-2018-20434/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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