CVE-2020-15663

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This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2."}], "problemTypes": [{"descriptions": [{"description": "Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-10-01T18:43:38.000Z", "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-41/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-36/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-38/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-40/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-37/"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@mozilla.org", "ID": "CVE-2020-15663", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Firefox", "version": {"version_data": [{"version_affected": "<", "version_value": "80"}]}}, {"product_name": "Thunderbird", "version": {"version_data": [{"version_affected": "<", "version_value": "78.2"}, {"version_affected": "<", "version_value": "68.12"}]}}, {"product_name": "Firefox ESR", "version": {"version_data": [{"version_affected": "<", "version_value": "68.12"}, {"version_affected": "<", "version_value": "78.2"}]}}]}, "vendor_name": "Mozilla"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. 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This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege"}]}]}, "references": {"reference_data": [{"name": "https://www.mozilla.org/security/advisories/mfsa2020-41/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2020-41/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2020-36/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2020-36/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2020-38/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2020-38/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2020-40/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2020-40/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2020-37/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2020-37/"}, {"name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199", "refsource": "MISC", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T13:22:30.566Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-41/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-36/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-38/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-40/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-37/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199"}]}]}, "cveMetadata": {"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "assignerShortName": "mozilla", "cveId": "CVE-2020-15663", "datePublished": "2020-10-01T18:43:38.000Z", "dateReserved": "2020-07-10T00:00:00.000Z", "dateUpdated": "2024-08-04T13:22:30.566Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThan": "80", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThan": "78.2", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "68.12", "status": "affected", "version": "unspecified", "versionType": "custom"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"lessThan": "68.12", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "78.2", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "334D3118-529D-4AAB-82A4-1EC3AA047D3D", "versionEndExcluding": "80.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "08650C9C-1E2B-4BFC-913A-08A8E92AFB0A", "versionEndExcluding": "78.2", "versionStartIncluding": "78.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*", "matchCriteriaId": "177D0A81-656D-40BD-926F-AD91D36CFC0D", "versionEndExcluding": "68.12", "versionStartIncluding": "68.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "D26946C2-8150-4DDC-B064-1BFEC726E48D", "versionEndExcluding": "68.12", "versionStartIncluding": "68.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "37E82BAB-B6B4-430E-A4FC-A83800A89B8E", "versionEndExcluding": "78.2", "versionStartIncluding": "78.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2."}, {"lang": "es", "value": "Si Firefox est\u00e1 instalado en un directorio escribible por el usuario, el Servicio de Mantenimiento de Mozilla ejecutar\u00e1 el archivo updater.exe desde la ubicaci\u00f3n de instalaci\u00f3n con privilegios del sistema.&#xa0;Aunque el Servicio de Mantenimiento de Mozilla garantiza que el archivo updater.exe est\u00e9 firmado por Mozilla, la versi\u00f3n podr\u00eda haberse revertido a una versi\u00f3n anterior, lo que podr\u00eda haber permitido una explotaci\u00f3n de un error anterior y una ejecuci\u00f3n de c\u00f3digo arbitrario con Privilegios System.&#xa0;*Nota: este problema solo afect\u00f3 a los sistemas operativos Windows.&#xa0;Otros sistemas operativos no est\u00e1n afectados.*.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 80, Thunderbird versiones anteriores a 78.2, Thunderbird versiones anteriores a 68.12, Firefox ESR versiones anteriores a 68.12 y Firefox ESR versiones anteriores a 78.2"}], "id": "CVE-2020-15663", "lastModified": "2026-06-17T02:57:00.587", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 9.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-10-01T19:15:12.970", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-36/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-37/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-38/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-40/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-41/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643199"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-36/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-37/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-38/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-40/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-41/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-427"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Xiaoyin Liu as the original reporter.", "bugzilla": {"description": "Mozilla: Downgrade attack on the Mozilla Maintenance Service could have resulted in escalation of privilege", "id": "1872530", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1872530"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-282", "details": ["If Firefox is installed to a user-writable directory, the Mozilla Maintenance Service would execute updater.exe from the install location with system privileges. Although the Mozilla Maintenance Service does ensure that updater.exe is signed by Mozilla, the version could have been rolled back to a previous version which would have allowed exploitation of an older bug and arbitrary code execution with System Privileges. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, and Firefox ESR < 78.2."], "name": "CVE-2020-15663", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 8"}], "public_date": "2020-08-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-15663\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-15663\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2020-37/#CVE-2020-15663"], "threat_severity": "Important"}

{}