{
  "id": "CVE-2021-30159",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2021-04-09T07:15:16.277",
  "lastModified": "2022-05-27T19:05:18.947",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in MediaWiki before 1.31.12 and 1.32.x through 1.35.x before 1.35.2. Users can bypass intended restrictions on deleting pages in certain \"fast double move\" situations. MovePage::isValidMoveTarget() uses FOR UPDATE, but it's only called if Title::getArticleID() returns non-zero with no special flags. Next, MovePage::moveToInternal() will delete the page if getArticleID(READ_LATEST) is non-zero. Therefore, if the page is missing in the replica DB, isValidMove() will return true, and then moveToInternal() will unconditionally delete the page if it can be found in the master."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un problema en MediaWiki versiones anteriores a 1.31.12 y versiones 1.32.x hasta 1.35.x versiones anteriores a 1.35.2. Unos usuarios pueden omitir unas restricciones previstas sobre la eliminaci\u00f3n de p\u00e1ginas en determinadas situaciones de \"fast double move\". La funci\u00f3n MovePage::isValidMoveTarget() usa FOR UPDATE, pero solo es llamada si la funci\u00f3n Title::getArticleID() devuelve un valor distinto de cero sin indicadores especiales. A continuaci\u00f3n, MovePage::moveToInternal() eliminar\u00e1 la p\u00e1gina si getArticleID(READ_LATEST) no es cero. Por lo tanto, si la p\u00e1gina falta en la r\u00e9plica de la base de datos, la funci\u00f3n isValidMove() devolver\u00e1 verdadero, y luego moveToInternal() eliminar\u00e1 incondicionalmente la p\u00e1gina si se puede encontrar en el maestro"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE",
          "baseScore": 4.3,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:N",
          "accessVector": "NETWORK",
          "accessComplexity": "LOW",
          "authentication": "SINGLE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "PARTIAL",
          "availabilityImpact": "NONE",
          "baseScore": 4.0
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.0,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.31.12",
              "matchCriteriaId": "3291BAE5-6903-463D-9750-7D0B6FAD911A"
            },
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              "vulnerable": true,
              "criteria": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "1.32.0",
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          "cpeMatch": [
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  ],
  "references": [
    {
      "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00003.html",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.debian.org/debian-lts-announce/2021/05/msg00006.html",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/26UJGHF7LJDOCQN6A3Z4PM7PYRKENJHE/",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2OMSV7B2TCFBOCICN3B4SMQP5HVRJQIT/",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://phabricator.wikimedia.org/T272386",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://security.gentoo.org/glsa/202107-40",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.debian.org/security/2021/dsa-4889",
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ]
    }
  ]
}