FKIE_CVE-2017-5637

Vulnerability from fkie_nvd - Published: 2017-10-10 01:30 - Updated: 2026-06-17 01:20
Severity
7.5 (High) - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Two four letter word commands "wchp/wchc" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later.
References
security@apache.orghttp://www.debian.org/security/2017/dsa-3871Third Party Advisory
security@apache.orghttp://www.securityfocus.com/bid/98814Third Party Advisory, VDB Entry
security@apache.orghttps://access.redhat.com/errata/RHSA-2017:2477
security@apache.orghttps://access.redhat.com/errata/RHSA-2017:3354
security@apache.orghttps://access.redhat.com/errata/RHSA-2017:3355
security@apache.orghttps://issues.apache.org/jira/browse/ZOOKEEPER-2693Issue Tracking, Mitigation, Vendor Advisory
security@apache.orghttps://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E
security@apache.orghttps://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3E
security@apache.orghttps://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E
security@apache.orghttps://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E
security@apache.orghttps://www.oracle.com//security-alerts/cpujul2021.html
security@apache.orghttps://www.oracle.com/security-alerts/cpujul2020.html
af854a3a-2127-422b-91ae-364da2661108http://www.debian.org/security/2017/dsa-3871Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/98814Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:2477
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:3354
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2017:3355
af854a3a-2127-422b-91ae-364da2661108https://issues.apache.org/jira/browse/ZOOKEEPER-2693Issue Tracking, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com//security-alerts/cpujul2021.html
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujul2020.html
Impacted products
Vendor Product Version
apache zookeeper 3.4.0
apache zookeeper 3.4.1
apache zookeeper 3.4.2
apache zookeeper 3.4.3
apache zookeeper 3.4.4
apache zookeeper 3.4.5
apache zookeeper 3.4.6
apache zookeeper 3.4.7
apache zookeeper 3.4.8
apache zookeeper 3.4.9
apache zookeeper 3.5.0
apache zookeeper 3.5.1
apache zookeeper 3.5.2
debian debian_linux 8.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Apache ZooKeeper",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "status": "affected",
              "version": "3.4.0 to 3.4.9"
            },
            {
              "status": "affected",
              "version": "3.5.0 to 3.5.2"
            }
          ]
        }
      ],
      "source": "security@apache.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "F0E65AF7-9D19-4B31-9BE0-4EB07B2853F9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "98FFE2B9-6744-4198-946E-89D78EC5E72C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "075AF151-A8A1-48BC-BD8B-E123ACAD5A02",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.3:*:*:*:*:*:*:*",
              "matchCriteriaId": "AF7A6DB3-2F19-4155-B019-2325A3D1186F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.4:*:*:*:*:*:*:*",
              "matchCriteriaId": "7346C4C9-7788-4686-A9D3-0225CA1A5B39",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.5:*:*:*:*:*:*:*",
              "matchCriteriaId": "2BA6B730-25E1-489D-BBB7-18F9251EF20D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.6:*:*:*:*:*:*:*",
              "matchCriteriaId": "7DCF90EA-9BD7-42FE-A1C2-0C04D53543DC",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.7:*:*:*:*:*:*:*",
              "matchCriteriaId": "6E981E8B-0BEF-4644-919F-0BF7549D70E8",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.8:*:*:*:*:*:*:*",
              "matchCriteriaId": "10957A4F-4A07-4777-A92B-525C0AF9D99C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.4.9:*:*:*:*:*:*:*",
              "matchCriteriaId": "2732FE0E-9F19-46BE-BE05-3DF6ED7AC222",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.5.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "C6BC9FC3-2BFE-40D1-A647-801AC49CA0E0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.5.1:*:*:*:*:*:*:*",
              "matchCriteriaId": "31DA0549-5FD8-427E-995F-49B26854CB47",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:apache:zookeeper:3.5.2:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7974A08-51CA-4E28-A914-F2C5173E0C76",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Two four letter word commands \"wchp/wchc\" are CPU intensive and could cause spike of CPU utilization on Apache ZooKeeper server if abused, which leads to the server unable to serve legitimate client requests. Apache ZooKeeper thru version 3.4.9 and 3.5.2 suffer from this issue, fixed in 3.4.10, 3.5.3, and later."
    },
    {
      "lang": "es",
      "value": "Dos comandos con palabras de cuatro letras \"wchp/wchc\" provocan un gran consumo de CPU y podr\u00edan dar lugar a que se alcance el m\u00e1ximo uso de CPU en el servidor Apache ZooKeeper si se abusa de ellos, lo que da lugar a que el servidor quede deshabilitado para servir a peticiones de clientes leg\u00edtimos. Las versiones de la 3.4.9 a la 3.5.2 de Apache ZooKeeper tienen este problema, que fue solucionado en las versiones 3.4.10, 3.5.3 y posteriores."
    }
  ],
  "id": "CVE-2017-5637",
  "lastModified": "2026-06-17T01:20:53.820",
  "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
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2017-10-10T01:30:22.360",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://www.debian.org/security/2017/dsa-3871"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/98814"
    },
    {
      "source": "security@apache.org",
      "url": "https://access.redhat.com/errata/RHSA-2017:2477"
    },
    {
      "source": "security@apache.org",
      "url": "https://access.redhat.com/errata/RHSA-2017:3354"
    },
    {
      "source": "security@apache.org",
      "url": "https://access.redhat.com/errata/RHSA-2017:3355"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Issue Tracking",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://issues.apache.org/jira/browse/ZOOKEEPER-2693"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3E"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E"
    },
    {
      "source": "security@apache.org",
      "url": "https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E"
    },
    {
      "source": "security@apache.org",
      "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
    },
    {
      "source": "security@apache.org",
      "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://www.debian.org/security/2017/dsa-3871"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/98814"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2017:2477"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2017:3354"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2017:3355"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://issues.apache.org/jira/browse/ZOOKEEPER-2693"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.apache.org/thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.apache.org/thread.html/58170aeb7a681d462b7fa31cae81110cbb749d2dc83c5736a0bb8370%40%3Cdev.zookeeper.apache.org%3E"
    },
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      "url": "https://lists.apache.org/thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.apache.org/thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        },
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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