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FKIE_CVE-2021-32030

Vulnerability from fkie_nvd - Published: 2021-05-06 15:15 - Updated: 2026-06-17 03:52
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of '\0' matches the device's default value of '\0' in some situations. Note: All versions of Lyra Mini and earlier which are unsupported (End-of-Life, EOL) are also affected by this vulnerability, Consumers can mitigate this vulnerability by disabling the remote access features from WAN.
References
cve@mitre.orghttps://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.mdBroken Link, Exploit, Third Party Advisory
cve@mitre.orghttps://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/Product
cve@mitre.orghttps://www.asus.com/us/supportonly/lyra%20mini/helpdesk_bios/Product
cve@mitre.orghttps://www.atredis.com/blog/2021/4/30/asus-authentication-bypassExploit
af854a3a-2127-422b-91ae-364da2661108https://github.com/atredispartners/advisories/blob/master/ATREDIS-2020-0010.mdBroken Link, Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.asus.com/Networking-IoT-Servers/WiFi-Routers/ASUS-Gaming-Routers/RT-AC2900/HelpDesk_BIOS/Product
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-32030US Government Resource
Impacted products
Vendor Product Version
asus lyra_mini_firmware *
asus lyra_mini -
asus gt-ac2900_firmware *
asus gt-ac2900 -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cisaActionDue": "2025-06-23",
  "cisaExploitAdd": "2025-06-02",
  "cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
  "cisaVulnerabilityName": "ASUS Routers Improper Authentication Vulnerability",
  "configurations": [
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              "versionEndExcluding": "3.0.0.4.384.46630",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
        },
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              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
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              "matchCriteriaId": "5B364172-2986-4983-91BF-047F59D140DF",
              "versionEndExcluding": "3.0.0.4.386.42643",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
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          ],
          "negate": false,
          "operator": "OR"
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      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The administrator application on ASUS GT-AC2900 devices before 3.0.0.4.386.42643 and Lyra Mini before 3.0.0.4_384_46630 allows authentication bypass when processing remote input from an unauthenticated user, leading to unauthorized access to the administrator interface. This relates to handle_request in router/httpd/httpd.c and auth_check in web_hook.o. An attacker-supplied value of \u0027\\0\u0027 matches the device\u0027s default value of \u0027\\0\u0027 in some situations. Note: All versions of Lyra Mini and earlier which are unsupported (End-of-Life, EOL) are also affected by this vulnerability, Consumers can mitigate this vulnerability by disabling the remote access features from WAN."
    },
    {
      "lang": "es",
      "value": "La aplicaci\u00f3n de administrador en los dispositivos ASUS GT-AC2900 versiones anteriores a 3.0.0.4.386.42643, permite una omisi\u00f3n de autenticaci\u00f3n cuando es procesada la entrada remota de un usuario no autenticado, conllevando a un acceso no autorizado a la interfaz de administrador.\u0026#xa0;Esto se relaciona con la funci\u00f3n handle_request en el archivo router/httpd/httpd.c y auth_check en web_hook.o.\u0026#xa0;Un valor proporcionado por el atacante de \"\\0\" coincide con el valor predeterminado del dispositivo de \"\\0\" en algunas situaciones"
    }
  ],
  "id": "CVE-2021-32030",
  "lastModified": "2026-06-17T03:52:42.307",
  "metrics": {
    "cvssMetricV2": [
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        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 7.5,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 6.4,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
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          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-32030",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-06-06T03:55:25.546985Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2021-05-06T15:15:07.973",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
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    },
    {
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      "tags": [
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    {
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      "tags": [
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    },
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    },
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    },
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-287"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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