CVE-2020-27866 (GCVE-0-2020-27866)

Vulnerability from cvelistv5 – Published: 2021-02-11 23:35 – Updated: 2024-08-04 16:25
VLAI?
Summary
This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.
Severity ?
8.8 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
zdi
References
Impacted products
Vendor Product Version
NETGEAR Multiple Routers Affected: firmware version 1.2.0.62_1.0.1
Create a notification for this product.
Credits
1sd3d of Viettel Cyber Security
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T16:25:43.625Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.zerodayinitiative.com/advisories/ZDI-20-1451/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Multiple Routers",
          "vendor": "NETGEAR",
          "versions": [
            {
              "status": "affected",
              "version": "firmware version 1.2.0.62_1.0.1"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "1sd3d of Viettel Cyber Security"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355."
        }
      ],
      "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-288",
              "description": "CWE-288: Authentication Bypass Using an Alternate Path or Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-03-12T13:57:34",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-20-1451/"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "zdi-disclosures@trendmicro.com",
          "ID": "CVE-2020-27866",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Multiple Routers",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "firmware version 1.2.0.62_1.0.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "NETGEAR"
              }
            ]
          }
        },
        "credit": "1sd3d of Viettel Cyber Security",
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355."
            }
          ]
        },
        "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-288: Authentication Bypass Using an Alternate Path or Channel"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers",
              "refsource": "MISC",
              "url": "https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers"
            },
            {
              "name": "https://www.zerodayinitiative.com/advisories/ZDI-20-1451/",
              "refsource": "MISC",
              "url": "https://www.zerodayinitiative.com/advisories/ZDI-20-1451/"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2020-27866",
    "datePublished": "2021-02-11T23:35:39",
    "dateReserved": "2020-10-27T00:00:00",
    "dateUpdated": "2024-08-04T16:25:43.625Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "fkie_nvd": {
      "configurations": "[{\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"8AB0B236-6BC6-4E99-8792-6B01BD591D3A\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"A80B06A1-81B5-4C33-89F6-EC3F6E3068B5\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"2B01C772-D1D4-41F1-A33D-72A6A672502A\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"6B25A18F-DD96-45FE-B098-71E60CB0FFFE\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"BA359610-21DC-41C4-9430-8406B34490EB\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"2BFCD9A8-1846-48C4-9F14-3866E983FB74\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"E0FCF958-2F6A-4B79-B307-2FE23B7CE8FC\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6700:v2:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"9F9706E6-CA53-43E4-91B0-D52655C86860\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"EA434604-4916-4830-A96B-CEC0C8E5A1A0\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"09404083-B00B-4C1F-8085-BC242E625CA3\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"9E9457F1-F5E8-43CA-8697-3849E140B0CC\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6900:v2:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"2E8EB69B-6619-47B6-A073-D0B840D4EB0B\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"4D95583A-EC79-41FF-9496-DAB19A1A34DB\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"FECB83F9-D417-4FD3-B293-87BC177E3AEB\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"53B1B947-2E36-463C-848F-C5F5C0A5ECAF\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"AFD1A65C-F10F-4C52-8B6D-69992E512EB5\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"2A188F6E-5296-4511-97F2-9328B1E1F6CF\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"1F68AC3B-A31F-4AB0-89E9-BFFDE427AD3B\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.2.0.76\", \"matchCriteriaId\": \"33043216-4563-4195-88D7-93446302ECD1\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"6DA5420D-DD64-4A9C-9B5F-784F0ED2B464\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.104\", \"matchCriteriaId\": \"E662BF37-5D81-4B9F-898E-F91B09821555\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"B131B5C8-CB7F-433B-BA32-F05CE0E92A66\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.104\", \"matchCriteriaId\": \"7CD4B6F1-E58F-4B96-BF51-729F59FA1C8B\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"C91CADFA-59DB-4B6C-A914-848884F4A4BD\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.78\", \"matchCriteriaId\": \"33824B9B-1224-484A-AFF4-953573F299C6\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"3C395D49-57F9-4BC1-8619-57127355B86B\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.78\", \"matchCriteriaId\": \"DBA2E978-FFF7-470D-90BA-4DBDC009B076\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"D621D26D-B144-424A-A9CB-19488399ACC1\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.78\", \"matchCriteriaId\": \"B2AE3CE4-23B0-467E-B522-A211048D6AF3\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"4B302909-29CF-4E53-9CCB-8664D3FCB03A\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.1.0.78\", \"matchCriteriaId\": \"612DAD20-761D-41D5-A6AB-AA9975847D34\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"598B48C5-4706-4431-8C5A-DA496DD1052F\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.0.0.76\", \"matchCriteriaId\": \"B373C515-681A-4D80-9BFD-5E2DFD6F2DF0\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6120:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"D18D2CCD-424F-41D5-919B-E22B9FA68D36\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.0.0.48\", \"matchCriteriaId\": \"6EC58A4B-E061-49ED-BB2D-E0497846DBEE\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6020:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"5DDA7ABF-4C4B-4945-993A-F93BD8FCB55E\"}]}]}, {\"operator\": \"AND\", \"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"1.0.0.48\", \"matchCriteriaId\": \"AF9D1B97-7FF8-45D9-BFD6-72554BBB6008\"}]}, {\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": false, \"criteria\": \"cpe:2.3:h:netgear:r6080:-:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"1CEB5C49-53CF-44AE-9A7D-E7E6201BFE62\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.\"}, {\"lang\": \"es\", \"value\": \"Esta vulnerabilidad permite a los atacantes adyacentes a la red saltarse la autenticaci\\u00f3n en las instalaciones afectadas de los routers NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100 y Nighthawk AC2400. No se requiere autenticaci\\u00f3n para explotar esta vulnerabilidad. El fallo espec\\u00edfico existe en el servicio mini_httpd, que escucha en el puerto TCP 80 por defecto. El problema se debe a una l\\u00f3gica incorrecta de coincidencia de cadenas al acceder a p\\u00e1ginas protegidas. Un atacante puede aprovechar esto junto con otras vulnerabilidades para ejecutar c\\u00f3digo en el contexto de root. Era ZDI-CAN-11355\"}]",
      "id": "CVE-2020-27866",
      "lastModified": "2024-11-21T05:21:57.740",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"ADJACENT_NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.9}], \"cvssMetricV30\": [{\"source\": \"zdi-disclosures@trendmicro.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.0\", \"vectorString\": \"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"attackVector\": \"ADJACENT_NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:A/AC:L/Au:N/C:C/I:C/A:C\", \"baseScore\": 8.3, \"accessVector\": \"ADJACENT_NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 6.5, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-02-12T00:15:12.877",
      "references": "[{\"url\": \"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers\", \"source\": \"zdi-disclosures@trendmicro.com\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/\", \"source\": \"zdi-disclosures@trendmicro.com\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Vendor Advisory\"]}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}]",
      "sourceIdentifier": "zdi-disclosures@trendmicro.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"zdi-disclosures@trendmicro.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-288\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-287\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-27866\",\"sourceIdentifier\":\"zdi-disclosures@trendmicro.com\",\"published\":\"2021-02-12T00:15:12.877\",\"lastModified\":\"2024-11-21T05:21:57.740\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.\"},{\"lang\":\"es\",\"value\":\"Esta vulnerabilidad permite a los atacantes adyacentes a la red saltarse la autenticaci\u00f3n en las instalaciones afectadas de los routers NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100 y Nighthawk AC2400. No se requiere autenticaci\u00f3n para explotar esta vulnerabilidad. El fallo espec\u00edfico existe en el servicio mini_httpd, que escucha en el puerto TCP 80 por defecto. El problema se debe a una l\u00f3gica incorrecta de coincidencia de cadenas al acceder a p\u00e1ginas protegidas. Un atacante puede aprovechar esto junto con otras vulnerabilidades para ejecutar c\u00f3digo en el contexto de root. Era ZDI-CAN-11355\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV30\":[{\"source\":\"zdi-disclosures@trendmicro.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.8,\"impactScore\":5.9}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:L/Au:N/C:C/I:C/A:C\",\"baseScore\":8.3,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"COMPLETE\",\"integrityImpact\":\"COMPLETE\",\"availabilityImpact\":\"COMPLETE\"},\"baseSeverity\":\"HIGH\",\"exploitabilityScore\":6.5,\"impactScore\":10.0,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"zdi-disclosures@trendmicro.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-288\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-287\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"8AB0B236-6BC6-4E99-8792-6B01BD591D3A\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A80B06A1-81B5-4C33-89F6-EC3F6E3068B5\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"2B01C772-D1D4-41F1-A33D-72A6A672502A\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6B25A18F-DD96-45FE-B098-71E60CB0FFFE\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"BA359610-21DC-41C4-9430-8406B34490EB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BFCD9A8-1846-48C4-9F14-3866E983FB74\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"E0FCF958-2F6A-4B79-B307-2FE23B7CE8FC\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6700:v2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"9F9706E6-CA53-43E4-91B0-D52655C86860\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"EA434604-4916-4830-A96B-CEC0C8E5A1A0\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"09404083-B00B-4C1F-8085-BC242E625CA3\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"9E9457F1-F5E8-43CA-8697-3849E140B0CC\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6900:v2:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E8EB69B-6619-47B6-A073-D0B840D4EB0B\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"4D95583A-EC79-41FF-9496-DAB19A1A34DB\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"FECB83F9-D417-4FD3-B293-87BC177E3AEB\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"53B1B947-2E36-463C-848F-C5F5C0A5ECAF\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"AFD1A65C-F10F-4C52-8B6D-69992E512EB5\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"2A188F6E-5296-4511-97F2-9328B1E1F6CF\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1F68AC3B-A31F-4AB0-89E9-BFFDE427AD3B\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.2.0.76\",\"matchCriteriaId\":\"33043216-4563-4195-88D7-93446302ECD1\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6DA5420D-DD64-4A9C-9B5F-784F0ED2B464\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.104\",\"matchCriteriaId\":\"E662BF37-5D81-4B9F-898E-F91B09821555\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"B131B5C8-CB7F-433B-BA32-F05CE0E92A66\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.104\",\"matchCriteriaId\":\"7CD4B6F1-E58F-4B96-BF51-729F59FA1C8B\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C91CADFA-59DB-4B6C-A914-848884F4A4BD\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.78\",\"matchCriteriaId\":\"33824B9B-1224-484A-AFF4-953573F299C6\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C395D49-57F9-4BC1-8619-57127355B86B\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.78\",\"matchCriteriaId\":\"DBA2E978-FFF7-470D-90BA-4DBDC009B076\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D621D26D-B144-424A-A9CB-19488399ACC1\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.78\",\"matchCriteriaId\":\"B2AE3CE4-23B0-467E-B522-A211048D6AF3\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4B302909-29CF-4E53-9CCB-8664D3FCB03A\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.1.0.78\",\"matchCriteriaId\":\"612DAD20-761D-41D5-A6AB-AA9975847D34\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"598B48C5-4706-4431-8C5A-DA496DD1052F\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.0.0.76\",\"matchCriteriaId\":\"B373C515-681A-4D80-9BFD-5E2DFD6F2DF0\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6120:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D18D2CCD-424F-41D5-919B-E22B9FA68D36\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.0.0.48\",\"matchCriteriaId\":\"6EC58A4B-E061-49ED-BB2D-E0497846DBEE\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6020:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5DDA7ABF-4C4B-4945-993A-F93BD8FCB55E\"}]}]},{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.0.0.48\",\"matchCriteriaId\":\"AF9D1B97-7FF8-45D9-BFD6-72554BBB6008\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:netgear:r6080:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"1CEB5C49-53CF-44AE-9A7D-E7E6201BFE62\"}]}]}],\"references\":[{\"url\":\"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers\",\"source\":\"zdi-disclosures@trendmicro.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/\",\"source\":\"zdi-disclosures@trendmicro.com\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.