CVE-2019-3556

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One of those request handlers, dump-pcre-cache, can be used to output cached regular expressions from the current execution context into a file. The handler takes a parameter which specifies where on the filesystem to write this data. The parameter is not validated, allowing a malicious user to overwrite arbitrary files where the user running HHVM has write access. This issue affects HHVM versions prior to 4.56.2, all versions between 4.57.0 and 4.78.0, as well as 4.79.0, 4.80.0, 4.81.0, 4.82.0, and 4.83.0."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-22", "description": "Improper Limitation of a Pathname to a Restricted Directory (CWE-22)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-26T20:05:10.000Z", "orgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "shortName": "facebook"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://hhvm.com/blog/2020/11/12/security-update.html"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://www.facebook.com/security/advisories/cve-2019-3556"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve-assign@fb.com", "DATE_ASSIGNED": "2019-01-09", "ID": "CVE-2019-3556", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "HHVM", "version": {"version_data": [{"version_affected": "!>=", "version_value": "4.83.1"}, {"version_affected": ">=", "version_value": "4.83.0"}, {"version_affected": "!>=", "version_value": "4.82.1"}, {"version_affected": ">=", "version_value": "4.82.0"}, {"version_affected": "!>=", "version_value": "4.81.1"}, {"version_affected": ">=", "version_value": "4.81.0"}, {"version_affected": "!>=", "version_value": "4.80.1"}, {"version_affected": ">=", "version_value": "4.80.0"}, {"version_affected": "!>=", "version_value": "4.79.1"}, {"version_affected": ">=", "version_value": "4.79.0"}, {"version_affected": "!>=", "version_value": "4.78.1"}, {"version_affected": ">=", "version_value": "4.57.0"}, {"version_affected": "!>=", "version_value": "4.56.2"}, {"version_affected": "<", "version_value": "4.56.2"}]}}]}, "vendor_name": "Facebook"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "HHVM supports the use of an \"admin\" server which accepts administrative requests over HTTP. 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This issue affects HHVM versions prior to 4.56.2, all versions between 4.57.0 and 4.78.0, as well as 4.79.0, 4.80.0, 4.81.0, 4.82.0, and 4.83.0."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Improper Limitation of a Pathname to a Restricted Directory (CWE-22)"}]}]}, "references": {"reference_data": [{"name": "https://hhvm.com/blog/2020/11/12/security-update.html", "refsource": "CONFIRM", "url": "https://hhvm.com/blog/2020/11/12/security-update.html"}, {"name": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4", "refsource": "CONFIRM", "url": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4"}, {"name": "https://www.facebook.com/security/advisories/cve-2019-3556", "refsource": "CONFIRM", "url": "https://www.facebook.com/security/advisories/cve-2019-3556"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T19:12:09.554Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://hhvm.com/blog/2020/11/12/security-update.html"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.facebook.com/security/advisories/cve-2019-3556"}]}]}, "cveMetadata": {"assignerOrgId": "4fc57720-52fe-4431-a0fb-3d2c8747b827", "assignerShortName": "facebook", "cveId": "CVE-2019-3556", "datePublished": "2021-10-26T20:05:10.000Z", "dateReserved": "2019-01-02T00:00:00.000Z", "dateUpdated": "2024-08-04T19:12:09.554Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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One of those request handlers, dump-pcre-cache, can be used to output cached regular expressions from the current execution context into a file. The handler takes a parameter which specifies where on the filesystem to write this data. The parameter is not validated, allowing a malicious user to overwrite arbitrary files where the user running HHVM has write access. This issue affects HHVM versions prior to 4.56.2, all versions between 4.57.0 and 4.78.0, as well as 4.79.0, 4.80.0, 4.81.0, 4.82.0, and 4.83.0."}, {"lang": "es", "value": "HHVM soporta el uso de un servidor \"admin\" que acepta peticiones administrativas sobre HTTP. Uno de esos manejadores de peticiones, dump-pcre-cache, puede ser usado para dar salida a las expresiones regulares en cach\u00e9 del contexto de ejecuci\u00f3n actual en un archivo. El manejador toma un par\u00e1metro que especifica en qu\u00e9 parte del sistema de archivos es debido escribir estos datos. El par\u00e1metro no es comprobado, permitiendo a un usuario malicioso sobrescribir archivos arbitrarios en los que el usuario que ejecuta HHVM presenta acceso de escritura. Este problema afecta a las versiones de HHVM anteriores a 4.56.2, a todas las versiones entre la 4.57.0 y la 4.78.0, as\u00ed como a las versiones 4.79.0, 4.80.0, 4.81.0, 4.82.0 y 4.83.0"}], "id": "CVE-2019-3556", "lastModified": "2026-06-17T02:35:13.310", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 5.5, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:N/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-26T20:15:07.603", "references": [{"source": "cve-assign@fb.com", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4"}, {"source": "cve-assign@fb.com", "tags": ["Vendor Advisory"], "url": "https://hhvm.com/blog/2020/11/12/security-update.html"}, {"source": "cve-assign@fb.com", "tags": ["Broken Link"], "url": "https://www.facebook.com/security/advisories/cve-2019-3556"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/facebook/hhvm/commit/abe0b29e4d3a610f9bc920b8be4ad8403364c2d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://hhvm.com/blog/2020/11/12/security-update.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link"], "url": "https://www.facebook.com/security/advisories/cve-2019-3556"}], "sourceIdentifier": "cve-assign@fb.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-22"}], "source": "cve-assign@fb.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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