CVE-2023-22795

{
  "id": "CVE-2023-22795",
  "sourceIdentifier": "[email protected]",
  "published": "2023-02-09T20:15:11.420",
  "lastModified": "2026-10-24T13:10:00.147",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A regular expression based DoS vulnerability in Action Dispatch <6.1.7.1 and <7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad DoS basada en expresiones regulares en Action Dispatch anterior a 6.1.7.1 y anterior a 7.0.4.1 relacionada con el encabezado If-None-Match. Un encabezado HTTP If-None-Match especialmente diseñado puede hacer que el motor de expresiones regulares entre en un estado de retroceso catastrófico, cuando se ejecuta en una versión de Ruby inferior a 3.2.0. Esto puede hacer que el proceso utilice grandes cantidades de CPU y memoria, lo que lleva a una posible vulnerabilidad DoS. Todos los usuarios que ejecuten una versión afectada deben actualizar o utilizar una de las soluciones alternativas inmediatamente."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "https://github.com/rails/rails",
          "versions": [
            {
              "version": "6.1.7.1, 7.0.4.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
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        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    },
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1333"
        }
      ]
    }
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  "references": [
    {
      "url": "https://discuss.rubyonrails.org/t/cve-2023-22795-possible-redos-based-dos-vulnerability-in-action-dispatch/82118",
      "source": "[email protected]",
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}