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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "6F5DBE64-6529-4705-869D-4FD030CFADE0", "versionEndExcluding": "52.2.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "12FE3109-0EE6-49DC-974A-E522F55B17E1", "versionEndExcluding": "54.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "37E2AFA4-8E1E-4074-BA83-B32D702B439C", "versionEndExcluding": "52.2.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Characters from the \"Canadian Syllabics\" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw \"punycode\" form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from \"Aspirational Use Scripts\" such as Canadian Syllabics to be mixed with Latin characters in the \"moderately restrictive\" IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as \"Limited Use Scripts.\". This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2."}, {"lang": "es", "value": "Los caracteres del bloque unicode \"Canadian Syllabics\" pueden mezclarse con caracteres de otros bloques unicode en la barra de direcciones en lugar de ser presentados en su forma \"punycode\" sin procesar. Esto permite ataques de suplantaci\u00f3n de nombres de dominio mediante la confusi\u00f3n de caracteres. El est\u00e1ndar Unicode actual permite que los caracteres \"Aspirational Use Scripts\" como Canadian Syllabics se mezclen con los caracteres latinos en el perfil IDN \"moderadamente restrictivo\". Se ha modificado el comportamiento de Firefox para que coincida con la inminente versi\u00f3n 10.0 de Unicode, que elimina esta categor\u00eda y los trata como \"Limited Use Scripts\". La vulnerabilidad afecta a Firefox en versiones anteriores a la 54, Firefox ESR en versiones anteriores a la 52.2 y Thunderbird en versiones anteriores a la 52.2."}], "id": "CVE-2017-7764", "lastModified": "2025-11-25T17:50:16.803", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-06-11T21:29:08.437", "references": [{"source": "security@mozilla.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/99057"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1038689"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "http://www.unicode.org/reports/tr31/tr31-26.html#Aspirational_Use_Scripts"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:1440"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:1561"}, {"source": "security@mozilla.org", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1364283"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3881"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3918"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-15/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-16/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-17/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/99057"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1038689"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.unicode.org/reports/tr31/tr31-26.html#Aspirational_Use_Scripts"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:1440"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://access.redhat.com/errata/RHSA-2017:1561"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1364283"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3881"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3918"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-15/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-16/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2017-17/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Samuel Erb as the original reporter.", "affected_release": [{"advisory": "RHSA-2017:1440", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:52.2.0-1.el6_9", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-06-14T00:00:00Z"}, {"advisory": "RHSA-2017:1561", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "thunderbird-0:52.2.0-1.el6_9", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2017-06-21T00:00:00Z"}, {"advisory": "RHSA-2017:1440", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:52.2.0-1.el7_3", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-06-14T00:00:00Z"}, {"advisory": "RHSA-2017:1561", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:52.2.0-1.el7_3", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2017-06-21T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Domain spoofing with combination of Canadian Syllabics and other unicode blocks (MFSA 2017-16)", "id": "1461262", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1461262"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.3", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "status": "verified"}, "details": ["Characters from the \"Canadian Syllabics\" unicode block can be mixed with characters from other unicode blocks in the addressbar instead of being rendered as their raw \"punycode\" form, allowing for domain name spoofing attacks through character confusion. The current Unicode standard allows characters from \"Aspirational Use Scripts\" such as Canadian Syllabics to be mixed with Latin characters in the \"moderately restrictive\" IDN profile. We have changed Firefox behavior to match the upcoming Unicode version 10.0 which removes this category and treats them as \"Limited Use Scripts.\". This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2."], "name": "CVE-2017-7764", "public_date": "2017-06-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-7764\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-7764\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2017-16/#CVE-2017-7764"], "threat_severity": "Moderate"}

{}