CVE-2021-34947 (GCVE-0-2021-34947)

Vulnerability from cvelistv5 – Published: 2024-05-07 22:54 – Updated: 2024-08-04 00:26
VLAI?
Summary
NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root. . Was ZDI-CAN-13055.
Severity ?
8.8 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
zdi
References
Impacted products
Vendor Product Version
NETGEAR R7800 Affected: 1.0.2.82
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-21-1116/\", \"name\": \"ZDI-21-1116\", \"tags\": [\"x_research-advisory\", \"x_transferred\"]}, {\"url\": \"https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129\", \"name\": \"vendor-provided URL\", \"tags\": [\"vendor-advisory\", \"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T00:26:55.741Z\"}}, {\"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-34947\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-05-08T14:59:27.888131Z\"}}}], \"affected\": [{\"cpes\": [\"cpe:2.3:h:netgear:r7800:-:*:*:*:*:*:*:*\"], \"vendor\": \"netgear\", \"product\": \"r7800\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.0.2.82\"}], \"defaultStatus\": \"unknown\"}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-05-08T15:00:49.945Z\"}, \"title\": \"CISA ADP Vulnrichment\"}], \"cna\": {\"title\": \"NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability\", \"source\": {\"lang\": \"en\", \"value\": \"Hoang Thach Nguyen of STAR Labs\"}, \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_0\": {\"version\": \"3.0\", \"baseScore\": 8.8, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\"}}], \"affected\": [{\"vendor\": \"NETGEAR\", \"product\": \"R7800\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.0.2.82\"}], \"defaultStatus\": \"unknown\"}], \"datePublic\": \"2021-09-28T03:46:45.280-05:00\", \"references\": [{\"url\": \"https://www.zerodayinitiative.com/advisories/ZDI-21-1116/\", \"name\": \"ZDI-21-1116\", \"tags\": [\"x_research-advisory\"]}, {\"url\": \"https://kb.netgear.com/000064044/Security-Advisory-for-Pre-Authentication-Buffer-Overflow-on-Some-Routers-PSV-2021-0129\", \"name\": \"vendor-provided URL\", \"tags\": [\"vendor-advisory\"]}], \"dateAssigned\": \"2021-06-30T08:56:51.627-05:00\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"NETGEAR R7800 net-cgi Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R7800 routers. Authentication is not required to exploit this vulnerability.\\n\\nThe specific flaw exists within the parsing of the soap_block_table file. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated data structure. An attacker can leverage this vulnerability to execute code in the context of root.\\n. Was ZDI-CAN-13055.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787: Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"99f1926a-a320-47d8-bbb5-42feb611262e\", \"shortName\": \"zdi\", \"dateUpdated\": \"2024-05-07T22:54:22.897Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-34947\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-08-04T00:26:55.741Z\", \"dateReserved\": \"2021-06-17T19:27:05.647Z\", \"assignerOrgId\": \"99f1926a-a320-47d8-bbb5-42feb611262e\", \"datePublished\": \"2024-05-07T22:54:22.897Z\", \"assignerShortName\": \"zdi\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.