FKIE_CVE-2021-3838

Vulnerability from fkie_nvd - Published: 2024-11-15 11:15 - Updated: 2024-11-19 17:11
Severity ?
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the file_get_contents() function. An attacker who can upload files of any type to the server can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution, especially when DOMPdf is used with frameworks with documented POP chains like Laravel or vulnerable developer code.
References
security@huntr.devhttps://github.com/dompdf/dompdf/commit/99aeec1efec9213e87098d42eb09439e7ee0bb6aPatch
security@huntr.devhttps://huntr.com/bounties/0bdddc12-ff67-4815-ab9f-6011a974f48eExploit, Issue Tracking, Patch, Third Party Advisory
Impacted products
Vendor Product Version
dompdf_project dompdf *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:dompdf_project:dompdf:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "CF3441FB-3B15-4935-8A8F-964D7DDFBCAD",
              "versionEndExcluding": "2.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "DomPDF before version 2.0.0 is vulnerable to PHAR deserialization due to a lack of checking on the protocol before passing it into the file_get_contents() function. An attacker who can upload files of any type to the server can pass in the phar:// protocol to unserialize the uploaded file and instantiate arbitrary PHP objects. This can lead to remote code execution, especially when DOMPdf is used with frameworks with documented POP chains like Laravel or vulnerable developer code."
    },
    {
      "lang": "es",
      "value": "DomPDF anterior a la versi\u00f3n 2.0.0 es vulnerable a la deserializaci\u00f3n de PHAR debido a la falta de verificaci\u00f3n del protocolo antes de pasarlo a la funci\u00f3n file_get_contents(). Un atacante que pueda cargar archivos de cualquier tipo al servidor puede pasar el protocolo phar:// para deserializar el archivo cargado y crear instancias de objetos PHP arbitrarios. Esto puede provocar la ejecuci\u00f3n remota de c\u00f3digo, especialmente cuando DOMPdf se utiliza con marcos con cadenas POP documentadas como Laravel o c\u00f3digo de desarrollador vulnerable."
    }
  ],
  "id": "CVE-2021-3838",
  "lastModified": "2024-11-19T17:11:23.277",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security@huntr.dev",
        "type": "Secondary"
      }
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    "cvssMetricV31": [
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          "attackComplexity": "LOW",
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          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
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        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
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  },
  "published": "2024-11-15T11:15:05.763",
  "references": [
    {
      "source": "security@huntr.dev",
      "tags": [
        "Patch"
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      "url": "https://github.com/dompdf/dompdf/commit/99aeec1efec9213e87098d42eb09439e7ee0bb6a"
    },
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      "tags": [
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        "Issue Tracking",
        "Patch",
        "Third Party Advisory"
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    }
  ],
  "sourceIdentifier": "security@huntr.dev",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security@huntr.dev",
      "type": "Primary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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