fkie_cve-2021-42717
Vulnerability from fkie_nvd
Published
2021-12-07 22:15
Modified
2024-11-21 06:28
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.
References
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2022/05/msg00042.htmlMailing List, Third Party Advisory
cve@mitre.orghttps://www.debian.org/security/2021/dsa-5023Third Party Advisory
cve@mitre.orghttps://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
cve@mitre.orghttps://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/Exploit, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/05/msg00042.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2021/dsa-5023Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/Exploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
trustwave modsecurity *
trustwave modsecurity *
f5 nginx_modsecurity_waf r24
f5 nginx_modsecurity_waf r25
debian debian_linux 9.0
debian debian_linux 10.0
debian debian_linux 11.0
oracle http_server 12.2.1.3.0
oracle http_server 12.2.1.4.0
oracle zfs_storage_appliance_kit 8.8


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7085082-64B3-4129-89D3-DCABF3C627A4",
              "versionEndExcluding": "2.9.5",
              "versionStartIncluding": "2.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:trustwave:modsecurity:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8A1F00F0-6D1E-42BC-850E-BFBB7685BE0C",
              "versionEndExcluding": "3.0.6",
              "versionStartIncluding": "3.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "matchCriteriaId": "241BDE1D-8BA6-4D65-9C13-AC06737DB329",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:f5:nginx_modsecurity_waf:r25:*:*:*:*:*:*:*",
              "matchCriteriaId": "25F3AE46-B782-42F8-9516-BD979CB9061F",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
              "vulnerable": true
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          ],
          "negate": false,
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    {
      "nodes": [
        {
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            {
              "criteria": "cpe:2.3:a:oracle:http_server:12.2.1.3.0:*:*:*:*:*:*:*",
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              "vulnerable": true
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            {
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              "matchCriteriaId": "AD04BEE5-E9A8-4584-A68C-0195CE9C402C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
              "matchCriteriaId": "D3E503FB-6279-4D4A-91D8-E237ECF9D2B0",
              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4."
    },
    {
      "lang": "es",
      "value": "ModSecurity versiones 3.x hasta 3.0.5, maneja inapropiadamente los objetos JSON excesivamente anidados. Los objetos JSON dise\u00f1ados con un anidamiento de decenas de miles de metros de profundidad pod\u00edan hacer que el servidor web no pudiera atender peticiones leg\u00edtimas. Incluso una petici\u00f3n HTTP moderadamente grande (por ejemplo, 300KB) puede ocupar uno de los limitados procesos de trabajo de NGINX durante minutos y consumir casi toda la CPU disponible en la m\u00e1quina. Modsecurity 2 es igualmente vulnerable: las versiones afectadas incluyen la 2.8.0 hasta la 2.9.4"
    }
  ],
  "id": "CVE-2021-42717",
  "lastModified": "2024-11-21T06:28:01.980",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 5.0,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-12-07T22:15:06.950",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ],
      "url": "https://lists.debian.org/debian-lts-announce/2022/05/msg00042.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      "url": "https://www.debian.org/security/2021/dsa-5023"
    },
    {
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      "tags": [
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        "Third Party Advisory"
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    },
    {
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      "tags": [
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      "url": "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/"
    },
    {
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      ],
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.debian.org/security/2021/dsa-5023"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"
    },
    {
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      "url": "https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/modsecurity-dos-vulnerability-in-json-parsing-cve-2021-42717/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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