CVE-2019-11763

{"containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 70"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 68.2"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 68.2"}]}], "descriptions": [{"lang": "en", "value": "Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2."}], "problemTypes": [{"descriptions": [{"description": "Incorrect HTML parsing results in XSS bypass technique", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-04-29T02:07:16.000Z", "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-35/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-33/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-34/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216"}, {"name": "GLSA-202003-10", "tags": ["vendor-advisory", "x_refsource_GENTOO"], "url": "https://security.gentoo.org/glsa/202003-10"}, {"name": "USN-4335-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/4335-1/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@mozilla.org", "ID": "CVE-2019-11763", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Firefox", "version": {"version_data": [{"version_value": "before 70"}]}}, {"product_name": "Thunderbird", "version": {"version_data": [{"version_value": "before 68.2"}]}}, {"product_name": "Firefox ESR", "version": {"version_data": [{"version_value": "before 68.2"}]}}]}, "vendor_name": "Mozilla"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Incorrect HTML parsing results in XSS bypass technique"}]}]}, "references": {"reference_data": [{"name": "https://www.mozilla.org/security/advisories/mfsa2019-35/", "refsource": "CONFIRM", "url": "https://www.mozilla.org/security/advisories/mfsa2019-35/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2019-33/", "refsource": "CONFIRM", "url": "https://www.mozilla.org/security/advisories/mfsa2019-33/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2019-34/", "refsource": "CONFIRM", "url": "https://www.mozilla.org/security/advisories/mfsa2019-34/"}, {"name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216", "refsource": "CONFIRM", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216"}, {"name": "GLSA-202003-10", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/202003-10"}, {"name": "USN-4335-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/4335-1/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T23:03:32.794Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-35/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-33/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-34/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216"}, {"name": "GLSA-202003-10", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/202003-10"}, {"name": "USN-4335-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/4335-1/"}]}]}, "cveMetadata": {"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "assignerShortName": "mozilla", "cveId": "CVE-2019-11763", "datePublished": "2020-01-08T19:59:44.000Z", "dateReserved": "2019-05-03T00:00:00.000Z", "dateUpdated": "2024-08-04T23:03:32.794Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 70"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 68.2"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "before 68.2"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "F4EA7BDA-DA95-46FB-8568-E857D3479994", "versionEndExcluding": "70.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*", "matchCriteriaId": "19FED95C-5BAF-4E31-8F60-E51609BA3BDB", "versionEndExcluding": "68.2", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "2CE97332-80EC-4CDF-A18C-37CD645A8A12", "versionEndExcluding": "68.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*", "matchCriteriaId": "7A5301BF-1402-4BE0-A0F8-69FBE79BC6D6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2."}, {"lang": "es", "value": "Si no se manejan correctamente los bytes nulos cuando se procesan entidades HTML, Firefox analiza de manera incorrecta estas entidades. Esto podr\u00eda haber conllevado a que el texto de comentario HTML fuese tratado como un HTML, lo que podr\u00eda haber provocado una vulnerabilidad de tipo XSS en una aplicaci\u00f3n web bajo determinadas condiciones. Tambi\u00e9n podr\u00eda haber conllevado a que las entidades HTML sean enmascaradas desde los filtros, permitiendo el uso de entidades para enmascarar los caracteres actuales de inter\u00e9s de los filtros. Esta vulnerabilidad afecta a Firefox versiones anteriores a la versi\u00f3n 70, Thunderbird versiones anteriores 68.2 y Firefox ESR versiones anteriores a la versi\u00f3n 68.2."}], "id": "CVE-2019-11763", "lastModified": "2026-06-17T02:13:35.587", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/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": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.7, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-08T20:15:12.953", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking", "Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202003-10"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4335-1/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-33/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-34/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-35/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1584216"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202003-10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4335-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-33/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-34/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2019-35/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Gareth Heyes as the original reporter.", "affected_release": [{"advisory": "RHSA-2019:3281", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:68.2.0-4.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-10-31T00:00:00Z"}, {"advisory": "RHSA-2019:3756", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "thunderbird-0:68.2.0-2.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2019-11-06T00:00:00Z"}, {"advisory": "RHSA-2019:3193", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:68.2.0-1.el7_7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-10-24T00:00:00Z"}, {"advisory": "RHSA-2019:3210", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:68.2.0-1.el7_7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2019-10-29T00:00:00Z"}, {"advisory": "RHSA-2019:3196", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:68.2.0-2.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-10-24T00:00:00Z"}, {"advisory": "RHSA-2019:3237", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:68.2.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2019-10-29T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Incorrect HTML parsing results in XSS bypass technique", "id": "1764444", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1764444"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N", "status": "verified"}, "cwe": "CWE-79", "details": ["Failure to correctly handle null bytes when processing HTML entities resulted in Firefox incorrectly parsing these entities. This could have led to HTML comment text being treated as HTML which could have led to XSS in a web application under certain conditions. It could have also led to HTML entities being masked from filters - enabling the use of entities to mask the actual characters of interest from filters. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.", "A flaw was found in Mozilla Firefox and Thunderbird where null bytes were incorrectly parsed in HTML entities. This could lead to HTML comments being treated as code which could lead to XSS in a web application or HTML entities being masked from filters."], "name": "CVE-2019-11763", "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"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2019-10-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-11763\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-11763\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2019-33/#CVE-2019-11763"], "threat_severity": "Moderate"}

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