CVE-2021-27252 (GCVE-0-2021-27252)
Vulnerability from cvelistv5
Published
2021-04-14 15:45
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
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 firmware version 1.0.2.76. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. 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-12216.
References
zdi-disclosures@trendmicro.comhttps://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-ExtendersPatch, Vendor Advisory
zdi-disclosures@trendmicro.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-248/Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-ExtendersPatch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.zerodayinitiative.com/advisories/ZDI-21-248/Third Party Advisory, VDB Entry
Impacted products
Vendor Product Version
NETGEAR R7800 Version: firmware version 1.0.2.76
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         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. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. 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-12216.\"}, {\"lang\": \"es\", \"value\": \"Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar c\\u00f3digo arbitrario en las instalaciones afectadas de NETGEAR R7800 versiones de firmware 1.0.2.76. No es requerida una autenticaci\\u00f3n para explotar esta vulnerabilidad. El fallo espec\\u00edfico se presenta dentro del manejo del c\\u00f3digo de operaci\\u00f3n DHCP espec\\u00edfico del proveedor. El problema resulta de una falta de comprobaci\\u00f3n apropiada de una cadena suministrada por el usuario antes de usarla para ejecutar una llamada al sistema. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\\u00f3digo en el contexto de root. Era ZDI-CAN-12216\"}]",
         id: "CVE-2021-27252",
         lastModified: "2024-11-21T05:57:41.453",
         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: "2021-04-14T16:15:13.737",
         references: "[{\"url\": \"https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders\", \"source\": \"zdi-disclosures@trendmicro.com\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-21-248/\", \"source\": \"zdi-disclosures@trendmicro.com\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-21-248/\", \"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\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-78\"}]}]",
      },
      nvd: "{\"cve\":{\"id\":\"CVE-2021-27252\",\"sourceIdentifier\":\"zdi-disclosures@trendmicro.com\",\"published\":\"2021-04-14T16:15:13.737\",\"lastModified\":\"2024-11-21T05:57:41.453\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the vendor_specific DHCP opcode. 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-12216.\"},{\"lang\":\"es\",\"value\":\"Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar código arbitrario en las instalaciones afectadas de NETGEAR R7800 versiones de firmware 1.0.2.76. No es requerida una autenticación para explotar esta vulnerabilidad. El fallo específico se presenta dentro del manejo del código de operación DHCP específico del proveedor. El problema resulta de una falta de comprobación apropiada de una cadena suministrada por el usuario antes de usarla para ejecutar una llamada al sistema. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto de root. Era 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}


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UUIDv4 of the Vulnerability-Lookup instance
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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.