FKIE_CVE-2023-43622

Vulnerability from fkie_nvd - Published: 2023-10-23 07:15 - Updated: 2025-02-13 17:17
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known "slow loris" attack pattern. This has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout. This issue affects Apache HTTP Server: from 2.4.55 through 2.4.57. Users are recommended to upgrade to version 2.4.58, which fixes the issue.
References
security@apache.orghttps://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
security@apache.orghttps://security.netapp.com/advisory/ntap-20231027-0011/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://httpd.apache.org/security/vulnerabilities_24.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20231027-0011/Third Party Advisory
Impacted products
Vendor Product Version
apache http_server *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F9F28355-B47B-463B-862A-E493D0743CC9",
              "versionEndExcluding": "2.4.58",
              "versionStartIncluding": "2.4.55",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An attacker, opening a HTTP/2 connection with an initial window size of 0, was able to block handling of that connection indefinitely in Apache HTTP Server. This could be used to exhaust worker resources in the server, similar to the well known \"slow loris\" attack pattern.\nThis has been fixed in version 2.4.58, so that such connection are terminated properly after the configured connection timeout.\n\nThis issue affects Apache HTTP Server: from 2.4.55 through 2.4.57.\n\nUsers are recommended to upgrade to version 2.4.58, which fixes the issue."
    },
    {
      "lang": "es",
      "value": "Un atacante, al abrir una conexi\u00f3n HTTP/2 con un tama\u00f1o de ventana inicial de 0, pudo bloquear el manejo de esa conexi\u00f3n indefinidamente en el servidor HTTP Apache. Esto podr\u00eda usarse para agotar los recursos de los trabajadores en el servidor, similar al conocido patr\u00f3n de ataque \"slow loris\". Esto se solucion\u00f3 en la versi\u00f3n 2.4.58, de modo que dicha conexi\u00f3n finalice correctamente despu\u00e9s del tiempo de espera de conexi\u00f3n configurado. Este problema afecta al servidor HTTP Apache: desde 2.4.55 hasta 2.4.57. Se recomienda a los usuarios actualizar a la versi\u00f3n 2.4.58, que soluciona el problema."
    }
  ],
  "id": "CVE-2023-43622",
  "lastModified": "2025-02-13T17:17:13.110",
  "metrics": {
    "cvssMetricV31": [
      {
        "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": "2023-10-23T07:15:11.243",
  "references": [
    {
      "source": "security@apache.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "source": "security@apache.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20231027-0011/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://security.netapp.com/advisory/ntap-20231027-0011/"
    }
  ],
  "sourceIdentifier": "security@apache.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security@apache.org",
      "type": "Primary"
    }
  ]
}


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