CVE-2019-11730

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The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8."}, {"lang": "es", "value": "Se presenta una vulnerabilidad donde, si un usuario abre un archivo HTML guardado localmente, este archivo puede usar URIs file: para acceder a otros archivos en el mismo directorio o subdirectorios si los nombres son conocidos o adivinados. La API Fetch puede ser usada para leer el contenido de los archivos almacenados en estos directorios y pueden ser cargados en un servidor. Se demostr\u00f3 que, en combinaci\u00f3n con una popular aplicaci\u00f3n de mensajer\u00eda de Android, si un archivo adjunto HTML malicioso se env\u00eda a un usuario y lo abri\u00f3 en Firefox, debido al patr\u00f3n predecible de esta aplicaci\u00f3n para los nombres de archivos guardados localmente, es posible leer los archivos adjuntos que la v\u00edctima recibi\u00f3 de otros corresponsales. Esta vulnerabilidad afecta a Firefox ESR anterior a versi\u00f3n 60.8, Firefox anterior a versi\u00f3n 68 y Thunderbird anterior a versi\u00f3n 60.8."}], "id": "CVE-2019-11730", "lastModified": "2026-06-17T02:13:31.300", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2019-07-23T14:15:16.653", "references": [{"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00055.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00058.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00073.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": 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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Luigi Gubello as the original reporter.", "affected_release": [{"advisory": "RHSA-2019:1765", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:60.8.0-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-07-11T00:00:00Z"}, {"advisory": "RHSA-2019:1777", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "thunderbird-0:60.8.0-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-07-15T00:00:00Z"}, {"advisory": "RHSA-2019:1763", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:60.8.0-1.el7_6", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-07-11T00:00:00Z"}, {"advisory": "RHSA-2019:1775", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:60.8.0-1.el7_6", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-07-15T00:00:00Z"}, {"advisory": "RHSA-2019:1764", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:60.8.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-07-11T00:00:00Z"}, {"advisory": "RHSA-2019:1799", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:60.8.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-07-16T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Same-origin policy treats all files in a directory as having the same-origin", "id": "1728438", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1728438"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-829", "details": ["A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. It was demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app's predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8."], "name": "CVE-2019-11730", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2019-07-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-11730\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-11730\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2019-22/#CVE-2019-11730"], "threat_severity": "Moderate"}

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