FKIE_CVE-2023-45150

Vulnerability from fkie_nvd - Published: 2023-10-16 20:15 - Updated: 2024-11-21 08:26
Severity ?
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Summary
Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended that the Nextcloud Calendar app is upgraded to 4.4.4. The only workaround for users unable to upgrade is to disable the calendar app.
References
security-advisories@github.comhttps://github.com/nextcloud/calendar/pull/5358Patch
security-advisories@github.comhttps://github.com/nextcloud/security-advisories/security/advisories/GHSA-r936-8gwm-w452Vendor Advisory
security-advisories@github.comhttps://hackerone.com/reports/2058337Exploit, Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/calendar/pull/5358Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r936-8gwm-w452Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/2058337Exploit, Issue Tracking
Impacted products
Vendor Product Version
nextcloud calendar *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nextcloud:calendar:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AC6A69AB-4972-431A-8734-0234D2734BAF",
              "versionEndExcluding": "4.4.4",
              "versionStartIncluding": "1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nextcloud calendar is a calendar app for the Nextcloud server platform. Due to missing precondition checks the server was trying to validate strings of any length as email addresses even when megabytes of data were provided, eventually making the server busy and unresponsive. It is recommended that the Nextcloud Calendar app is upgraded to 4.4.4. The only workaround for users unable to upgrade is to disable the calendar app."
    },
    {
      "lang": "es",
      "value": "Nextcloud calendar es una aplicaci\u00f3n de calendario para la plataforma del servidor Nextcloud. Debido a la falta de comprobaciones de condiciones previas, el servidor intentaba validar cadenas de cualquier longitud como direcciones de correo electr\u00f3nico incluso cuando se proporcionaban megabytes de datos, lo que eventualmente hac\u00eda que el servidor estuviera ocupado y no respondiera. Se recomienda actualizar la aplicaci\u00f3n Calendario Nextcloud a 4.4.4. El \u00fanico workaround para los usuarios que no pueden actualizar es desactivar la aplicaci\u00f3n de calendario."
    }
  ],
  "id": "CVE-2023-45150",
  "lastModified": "2024-11-21T08:26:27.023",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
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        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
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          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
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  },
  "published": "2023-10-16T20:15:15.393",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/nextcloud/calendar/pull/5358"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/nextcloud/security-advisories/security/advisories/GHSA-r936-8gwm-w452"
    },
    {
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      "tags": [
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      "url": "https://hackerone.com/reports/2058337"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/nextcloud/calendar/pull/5358"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Issue Tracking"
      ],
      "url": "https://hackerone.com/reports/2058337"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-354"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.