GSD-2020-5756

Vulnerability from gsd - Updated: 2023-12-13 01:22
Details
Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system's crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.
Aliases
Aliases
CVE-2020-5756
To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-5756",
    "description": "Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system\u0027s crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.",
    "id": "GSD-2020-5756"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-5756"
      ],
      "details": "Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system\u0027s crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router.",
      "id": "GSD-2020-5756",
      "modified": "2023-12-13T01:22:03.634344Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "vulnreport@tenable.com",
        "ID": "CVE-2020-5756",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Grandstream GWN7000",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Versions 1.0.9.4 and below"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Tenable"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
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          {
            "lang": "eng",
            "value": "Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system\u0027s crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-489"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.tenable.com/security/research/tra-2020-41",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/research/tra-2020-41"
          }
        ]
      }
    },
    "nvd.nist.gov": {
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        "nodes": [
          {
            "children": [
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:o:grandstream:gwn7000_firmware:*:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "versionEndIncluding": "1.0.9.4",
                    "vulnerable": true
                  }
                ],
                "operator": "OR"
              },
              {
                "children": [],
                "cpe_match": [
                  {
                    "cpe23Uri": "cpe:2.3:h:grandstream:gwn7000:-:*:*:*:*:*:*:*",
                    "cpe_name": [],
                    "vulnerable": false
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                "operator": "OR"
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            "operator": "AND"
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          "ID": "CVE-2020-5756"
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        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "en",
              "value": "Grandstream GWN7000 firmware version 1.0.9.4 and below allows authenticated remote users to modify the system\u0027s crontab via undocumented API. An attacker can use this functionality to execute arbitrary OS commands on the router."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-78"
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              "name": "https://www.tenable.com/security/research/tra-2020-41",
              "refsource": "CONFIRM",
              "tags": [
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              "url": "https://www.tenable.com/security/research/tra-2020-41"
            },
            {
              "name": "MISC",
              "refsource": "https://www.tenable.com/cve/CVE-2020-5756",
              "tags": [
                "Exploit",
                "Third Party Advisory"
              ],
              "url": "https://www.tenable.com/cve/CVE-2020-5756"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 9.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 8.0,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 2.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2020-07-22T20:43Z",
      "publishedDate": "2020-07-17T21:15Z"
    }
  }
}


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