{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:knplabs:snappy:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C2412BC7-4738-4E4B-9382-9C967F55BEC0",
              "versionEndExcluding": "1.4.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "knplabs/knp-snappy is a PHP library allowing thumbnail, snapshot or PDF generation from a url or a html page.\n## Issue\n\nOn March 17th the vulnerability CVE-2023-28115 was disclosed, allowing an attacker to gain remote code execution through PHAR deserialization. Version 1.4.2 added a check `if (\\strpos($filename, \u0027phar://\u0027) === 0)` in the `prepareOutput` function to resolve this CVE, however if the user is able to control the second parameter of the `generateFromHtml()` function of Snappy, it will then be passed as the `$filename` parameter in the `prepareOutput()` function. In the original vulnerability, a file name with a `phar://` wrapper could be sent to the `fileExists()` function, equivalent to the `file_exists()` PHP function. This allowed users to trigger a deserialization on arbitrary PHAR files. To fix this issue, the string is now passed to the `strpos()` function and if it starts with `phar://`, an exception is raised. However, PHP wrappers being case insensitive, this patch can be bypassed using `PHAR://` instead of `phar://`. A successful exploitation of this vulnerability allows executing arbitrary code and accessing the underlying filesystem. The attacker must be able to upload a file and the server must be running a PHP version prior to 8. This issue has been addressed in commit `d3b742d61a` which has been included in version 1.4.3. Users are advised to upgrade. Users unable to upgrade should ensure that only trusted users may submit data to the `AbstractGenerator-\u003egenerate(...)` function.\n"
    },
    {
      "lang": "es",
      "value": "knplabs/knp-snappy es una librer\u00eda PHP que permite la generaci\u00f3n de thumbnail, snapshots o PDFs desde una URL o una p\u00e1gina HTML. ## El problema que revel\u00f3 la vulnerabilidad CVE-2023-28115 el 17 de marzo, permite a un atacante obtener la ejecuci\u00f3n remota de c\u00f3digo mediante la deserializaci\u00f3n PHAR. La versi\u00f3n 1.4.2 agreg\u00f3 una verificaci\u00f3n `if (\\strpos($filename, \u0027phar://\u0027) === 0)` en la funci\u00f3n `prepareOutput` para resolver este CVE, sin embargo, si el usuario puede controlar el segundo par\u00e1metro de la funci\u00f3n `generateFromHtml()` de Snappy, luego se pasar\u00e1 como el par\u00e1metro `$filename` en la funci\u00f3n `prepareOutput()`. En la vulnerabilidad original, un nombre de archivo con un contenedor `phar://` podr\u00eda enviarse a la funci\u00f3n `fileExists()`, equivalente a la funci\u00f3n PHP `file_exists()`. Esto permiti\u00f3 a los usuarios activar una deserializaci\u00f3n en archivos PHAR arbitrarios. Para solucionar este problema, la cadena ahora se pasa a la funci\u00f3n `strpos()` y si comienza con `phar://`, se genera una excepci\u00f3n. Sin embargo, como los contenedores de PHP no distinguen entre may\u00fasculas y min\u00fasculas, este parche se puede omitir usando `PHAR://` en lugar de `phar://`. Una explotaci\u00f3n exitosa de esta vulnerabilidad permite ejecutar c\u00f3digo arbitrario y acceder al sistema de archivos subyacente. El atacante debe poder cargar un archivo y el servidor debe ejecutar una versi\u00f3n de PHP anterior a la 8. Este problema se solucion\u00f3 en el commit `d3b742d61a` que se incluy\u00f3 en la versi\u00f3n 1.4.3. Se recomienda a los usuarios que actualicen. Los usuarios que no puedan actualizar deben asegurarse de que solo los usuarios confiables puedan enviar datos a la funci\u00f3n `AbstractGenerator-\u0026gt;generate(...)`."
    }
  ],
  "id": "CVE-2023-41330",
  "lastModified": "2024-11-21T08:21:05.347",
  "metrics": {
    "cvssMetricV31": [
      {
        "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
        "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"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2023-09-06T18:15:09.153",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/KnpLabs/snappy/commit/d3b742d61a68bf93866032c2c0a7f1486128b67e"
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    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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        "Mitigation",
        "Vendor Advisory"
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      "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-92rv-4j2h-8mjj"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Vendor Advisory"
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      "url": "https://github.com/KnpLabs/snappy/security/advisories/GHSA-gq6w-q6wh-jggc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}