variot - var-202103-0947

var-202103-0947

Vulnerability from variot

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12355. NETGEAR R7800 For firmware, OS A command injection vulnerability exists. Zero Day Initiative To this vulnerability ZDI-CAN-12355 Was numbered.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state

Show details on source website

JSON

To clipboard

{
  "affected_products": {
    "_id": null,
    "data": [
      {
        "_id": null,
        "model": "rbk53",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "r9000",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.5.28"
      },
      {
        "_id": null,
        "model": "ex6250",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "r7800",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.2.80"
      },
      {
        "_id": null,
        "model": "rbr20",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "r8900",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.5.28"
      },
      {
        "_id": null,
        "model": "rbk20",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "rbk40",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "ex6400",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.2.158"
      },
      {
        "_id": null,
        "model": "rbs50",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "rbs10",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "rbk12",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "rbs40",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "d7800",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.1.60"
      },
      {
        "_id": null,
        "model": "ex6420",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "ex7300",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.2.158"
      },
      {
        "_id": null,
        "model": "ex6400v2",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "ex7320",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "rbr50",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "rbk13",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "rbk23",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "br200",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "5.10.0.5"
      },
      {
        "_id": null,
        "model": "rbk44",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "xr500",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.3.2.114"
      },
      {
        "_id": null,
        "model": "lbr20",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.3.50"
      },
      {
        "_id": null,
        "model": "ex6150v2",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.1.98"
      },
      {
        "_id": null,
        "model": "rbs20",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "ex6410",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "rbs50y",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "rbk50",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "xr450",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.3.2.114"
      },
      {
        "_id": null,
        "model": "br500",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "5.10.0.5"
      },
      {
        "_id": null,
        "model": "rbk14",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "ex7300v2",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.134"
      },
      {
        "_id": null,
        "model": "xr700",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.1.38"
      },
      {
        "_id": null,
        "model": "rbr40",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "ex6100v2",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.1.98"
      },
      {
        "_id": null,
        "model": "rbk43",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "ex7700",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.0.216"
      },
      {
        "_id": null,
        "model": "rbr10",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "rbk43s",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.6.2.104"
      },
      {
        "_id": null,
        "model": "ex8000",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "1.0.1.232"
      },
      {
        "_id": null,
        "model": "rbk15",
        "scope": "lt",
        "trust": 1.0,
        "vendor": "netgear",
        "version": "2.7.2.104"
      },
      {
        "_id": null,
        "model": "ex6150v2",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6400v2",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6100v2",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "d7800",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "br200",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6250",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6420",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6410",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "ex6400",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "br500",
        "scope": null,
        "trust": 0.8,
        "vendor": "\u30cd\u30c3\u30c8\u30ae\u30a2",
        "version": null
      },
      {
        "_id": null,
        "model": "r7800",
        "scope": null,
        "trust": 0.7,
        "vendor": "netgear",
        "version": null
      }
    ],
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      }
    ]
  },
  "credits": {
    "_id": null,
    "data": "takeshi",
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      }
    ],
    "trust": 0.7
  },
  "cve": "CVE-2021-27256",
  "cvss": {
    "_id": null,
    "data": [
      {
        "cvssV2": [
          {
            "accessComplexity": "LOW",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "author": "nvd@nist.gov",
            "availabilityImpact": "COMPLETE",
            "baseScore": 8.3,
            "confidentialityImpact": "COMPLETE",
            "exploitabilityScore": 6.5,
            "id": "CVE-2021-27256",
            "impactScore": 10.0,
            "integrityImpact": "COMPLETE",
            "severity": "HIGH",
            "trust": 1.9,
            "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          }
        ],
        "cvssV3": [
          {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT",
            "author": "zdi-disclosures@trendmicro.com",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitabilityScore": 2.8,
            "id": "CVE-2021-27256",
            "impactScore": 5.9,
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 1.8,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT",
            "author": "nvd@nist.gov",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitabilityScore": 2.8,
            "id": "CVE-2021-27256",
            "impactScore": 5.9,
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 1.0,
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT",
            "author": "ZDI",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "exploitabilityScore": 2.8,
            "id": "CVE-2021-27256",
            "impactScore": 5.9,
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "trust": 0.7,
            "userInteraction": "NONE",
            "vectorString": "AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        ],
        "severity": [
          {
            "author": "nvd@nist.gov",
            "id": "CVE-2021-27256",
            "trust": 1.0,
            "value": "HIGH"
          },
          {
            "author": "zdi-disclosures@trendmicro.com",
            "id": "CVE-2021-27256",
            "trust": 1.0,
            "value": "HIGH"
          },
          {
            "author": "NVD",
            "id": "CVE-2021-27256",
            "trust": 0.8,
            "value": "High"
          },
          {
            "author": "ZDI",
            "id": "CVE-2021-27256",
            "trust": 0.7,
            "value": "HIGH"
          },
          {
            "author": "CNNVD",
            "id": "CNNVD-202102-1749",
            "trust": 0.6,
            "value": "HIGH"
          },
          {
            "author": "VULMON",
            "id": "CVE-2021-27256",
            "trust": 0.1,
            "value": "HIGH"
          }
        ]
      }
    ],
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      }
    ]
  },
  "description": {
    "_id": null,
    "data": "This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12355. NETGEAR R7800 For firmware, OS A command injection vulnerability exists. Zero Day Initiative To this vulnerability ZDI-CAN-12355 Was numbered.Information is obtained, information is tampered with, and service is disrupted (DoS) It may be put into a state",
    "sources": [
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256"
      }
    ],
    "trust": 2.34
  },
  "external_ids": {
    "_id": null,
    "data": [
      {
        "db": "NVD",
        "id": "CVE-2021-27256",
        "trust": 3.2
      },
      {
        "db": "ZDI",
        "id": "ZDI-21-262",
        "trust": 3.2
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431",
        "trust": 0.8
      },
      {
        "db": "ZDI_CAN",
        "id": "ZDI-CAN-12355",
        "trust": 0.7
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749",
        "trust": 0.6
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256",
        "trust": 0.1
      }
    ],
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      }
    ]
  },
  "id": "VAR-202103-0947",
  "iot": {
    "_id": null,
    "data": true,
    "sources": [
      {
        "db": "VARIoT devices database",
        "id": null
      }
    ],
    "trust": 0.26161140789473686
  },
  "last_update_date": "2024-11-23T22:57:58.511000Z",
  "patch": {
    "_id": null,
    "data": [
      {
        "title": "Security\u00a0Advisory\u00a0for\u00a0Multiple\u00a0Vulnerabilities\u00a0on\u00a0Some\u00a0Routers,\u00a0Satellites,\u00a0and\u00a0Extenders",
        "trust": 1.5,
        "url": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders"
      },
      {
        "title": "NETGEAR Security vulnerabilities",
        "trust": 0.6,
        "url": "http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=142980"
      }
    ],
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      }
    ]
  },
  "problemtype_data": {
    "_id": null,
    "data": [
      {
        "problemtype": "CWE-78",
        "trust": 1.0
      },
      {
        "problemtype": "OS Command injection (CWE-78) [ Other ]",
        "trust": 0.8
      }
    ],
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      }
    ]
  },
  "references": {
    "_id": null,
    "data": [
      {
        "trust": 3.2,
        "url": "https://www.zerodayinitiative.com/advisories/zdi-21-262/"
      },
      {
        "trust": 2.4,
        "url": "https://kb.netgear.com/000062883/security-advisory-for-multiple-vulnerabilities-on-some-routers-satellites-and-extenders"
      },
      {
        "trust": 1.4,
        "url": "https://nvd.nist.gov/vuln/detail/cve-2021-27256"
      },
      {
        "trust": 0.1,
        "url": "https://cwe.mitre.org/data/definitions/78.html"
      },
      {
        "trust": 0.1,
        "url": "https://nvd.nist.gov"
      }
    ],
    "sources": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262"
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256"
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256"
      }
    ]
  },
  "sources": {
    "_id": null,
    "data": [
      {
        "db": "ZDI",
        "id": "ZDI-21-262",
        "ident": null
      },
      {
        "db": "VULMON",
        "id": "CVE-2021-27256",
        "ident": null
      },
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431",
        "ident": null
      },
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749",
        "ident": null
      },
      {
        "db": "NVD",
        "id": "CVE-2021-27256",
        "ident": null
      }
    ]
  },
  "sources_release_date": {
    "_id": null,
    "data": [
      {
        "date": "2021-02-26T00:00:00",
        "db": "ZDI",
        "id": "ZDI-21-262",
        "ident": null
      },
      {
        "date": "2021-03-05T00:00:00",
        "db": "VULMON",
        "id": "CVE-2021-27256",
        "ident": null
      },
      {
        "date": "2021-11-22T00:00:00",
        "db": "JVNDB",
        "id": "JVNDB-2021-004431",
        "ident": null
      },
      {
        "date": "2021-02-26T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202102-1749",
        "ident": null
      },
      {
        "date": "2021-03-05T20:15:12.550000",
        "db": "NVD",
        "id": "CVE-2021-27256",
        "ident": null
      }
    ]
  },
  "sources_update_date": {
    "_id": null,
    "data": [
      {
        "date": "2021-02-26T00:00:00",
        "db": "ZDI",
        "id": "ZDI-21-262",
        "ident": null
      },
      {
        "date": "2021-03-16T00:00:00",
        "db": "VULMON",
        "id": "CVE-2021-27256",
        "ident": null
      },
      {
        "date": "2021-11-22T05:39:00",
        "db": "JVNDB",
        "id": "JVNDB-2021-004431",
        "ident": null
      },
      {
        "date": "2021-03-19T00:00:00",
        "db": "CNNVD",
        "id": "CNNVD-202102-1749",
        "ident": null
      },
      {
        "date": "2024-11-21T05:57:42.160000",
        "db": "NVD",
        "id": "CVE-2021-27256",
        "ident": null
      }
    ]
  },
  "threat_type": {
    "_id": null,
    "data": "remote or local",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      }
    ],
    "trust": 0.6
  },
  "title": {
    "_id": null,
    "data": "NETGEAR\u00a0R7800\u00a0 In firmware \u00a0OS\u00a0 Command injection vulnerability",
    "sources": [
      {
        "db": "JVNDB",
        "id": "JVNDB-2021-004431"
      }
    ],
    "trust": 0.8
  },
  "type": {
    "_id": null,
    "data": "operating system commend injection",
    "sources": [
      {
        "db": "CNNVD",
        "id": "CNNVD-202102-1749"
      }
    ],
    "trust": 0.6
  }
}

cve-2021-27256

Vulnerability from cvelistv5

Published

2021-03-05 20:00

Modified

2024-08-03 20:48

Severity ?

8.8 (High) - CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

▼	URL	Tags
	https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders	x_refsource_MISC
	https://www.zerodayinitiative.com/advisories/ZDI-21-262/	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	NETGEAR	R7800	Version: firmware version 1.0.2.76

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:48:16.076Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-262/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "R7800",
          "vendor": "NETGEAR",
          "versions": [
            {
              "status": "affected",
              "version": "firmware version 1.0.2.76"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "takeshi"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12355."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-03-05T20:00:25",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-262/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "zdi-disclosures@trendmicro.com",
          "ID": "CVE-2021-27256",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "R7800",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "firmware version 1.0.2.76"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "NETGEAR"
              }
            ]
          }
        },
        "credit": "takeshi",
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_save.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12355."
            }
          ]
        },
        "impact": {
          "cvss": {
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.0"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-78: Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders",
              "refsource": "MISC",
              "url": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders"
            },
            {
              "name": "https://www.zerodayinitiative.com/advisories/ZDI-21-262/",
              "refsource": "MISC",
              "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-262/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2021-27256",
    "datePublished": "2021-03-05T20:00:25",
    "dateReserved": "2021-02-16T00:00:00",
    "dateUpdated": "2024-08-03T20:48:16.076Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

Action not permitted