gsd-2021-42717
Vulnerability from gsd
Modified
2023-12-13 01:23
Details
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.
Aliases
Aliases
CVE-2021-42717


To clipboard 

{
  "GSD": {
    "alias": "CVE-2021-42717",
    "description": "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.",
    "id": "GSD-2021-42717",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-42717.html",
      "https://www.debian.org/security/2021/dsa-5023",
      "https://advisories.mageia.org/CVE-2021-42717.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-42717"
      ],
      "details": "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.",
      "id": "GSD-2021-42717",
      "modified": "2023-12-13T01:23:06.805406Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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        "ID": "CVE-2021-42717",
        "STATE": "PUBLIC"
      },
      "affects": {
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            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
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            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2021/dsa-5023"
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          {
            "name": "https://www.oracle.com/security-alerts/cpuapr2022.html",
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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/"
          },
          {
            "name": "[debian-lts-announce] 20220528 [SECURITY] [DLA 3031-1] modsecurity-apache security update",
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    },
    "nvd.nist.gov": {
      "configurations": {
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                "cpe_name": [],
                "versionEndExcluding": "2.9.5",
                "versionStartIncluding": "2.0.0",
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              },
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            ],
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          },
          {
            "children": [],
            "cpe_match": [
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                "cpe23Uri": "cpe:2.3:a:f5:nginx_modsecurity_waf:r24:*:*:*:*:*:*:*",
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          },
          {
            "children": [],
            "cpe_match": [
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              {
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                "cpe_name": [],
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              {
                "cpe23Uri": "cpe:2.3:a:oracle:zfs_storage_appliance_kit:8.8:*:*:*:*:*:*:*",
                "cpe_name": [],
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          }
        ]
      },
      "cve": {
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
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              "description": [
                {
                  "lang": "en",
                  "value": "CWE-674"
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          ]
        },
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          "reference_data": [
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              "tags": [
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            },
            {
              "name": "DSA-5023",
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              "url": "https://www.debian.org/security/2021/dsa-5023"
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            },
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              "refsource": "MLIST",
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            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2022-09-03T03:33Z",
      "publishedDate": "2021-12-07T22:15Z"
    }
  }
}


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