CVE-2021-23960

{"containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 85"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 78.7"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 78.7"}]}], "descriptions": [{"lang": "en", "value": "Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7."}], "problemTypes": [{"descriptions": [{"description": "Use-after-poison for incorrectly redeclared JavaScript variables during GC", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-02-26T02:05:50.000Z", "orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/"}, {"tags": ["x_refsource_MISC"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@mozilla.org", "ID": "CVE-2021-23960", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Firefox", "version": {"version_data": [{"version_value": "< 85"}]}}, {"product_name": "Thunderbird", "version": {"version_data": [{"version_value": "< 78.7"}]}}, {"product_name": "Firefox ESR", "version": {"version_data": [{"version_value": "< 78.7"}]}}]}, "vendor_name": "Mozilla"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Use-after-poison for incorrectly redeclared JavaScript variables during GC"}]}]}, "references": {"reference_data": [{"name": "https://www.mozilla.org/security/advisories/mfsa2021-03/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2021-04/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/"}, {"name": "https://www.mozilla.org/security/advisories/mfsa2021-05/", "refsource": "MISC", "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/"}, {"name": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755", "refsource": "MISC", "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T19:14:09.953Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755"}]}]}, "cveMetadata": {"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "assignerShortName": "mozilla", "cveId": "CVE-2021-23960", "datePublished": "2021-02-26T02:05:50.000Z", "dateReserved": "2021-01-13T00:00:00.000Z", "dateUpdated": "2024-08-03T19:14:09.953Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 85"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 78.7"}]}, {"product": "Firefox ESR", "vendor": "Mozilla", "versions": [{"status": "affected", "version": "< 78.7"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*", "matchCriteriaId": "403EA47E-6B2D-4082-BFF2-E764C8356854", "versionEndExcluding": "85.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*", "matchCriteriaId": "0D2BEE15-C7C8-4C7C-A4A1-EFB496D75197", "versionEndExcluding": "78.7", "vulnerable": true}, {"criteria": "cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*", "matchCriteriaId": "80722896-DAE4-42FB-BF86-D609EEDEE5B9", "versionEndExcluding": "78.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7."}, {"lang": "es", "value": "Realizar una recolecci\u00f3n de basura en variables de JavaScript declaradas nuevamente result\u00f3 en un usuario despu\u00e9s del envenenamiento y un bloqueo potencialmente explotable.&#xa0;Esta vulnerabilidad afecta a Firefox versiones anteriores a 85, Thunderbird versiones anteriores a 78,7 y Firefox ESR versiones anteriores a 78,7"}], "id": "CVE-2021-23960", "lastModified": "2026-06-17T03:39:04.353", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "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": "2021-02-26T03:15:13.917", "references": [{"source": "security@mozilla.org", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/"}, {"source": "security@mozilla.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Permissions Required", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1675755"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-03/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-04/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2021-05/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Irvan Kurniawan as the original reporter.", "affected_release": [{"advisory": "RHSA-2021:0290", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:78.7.0-2.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0297", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:78.7.0-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0288", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:78.7.0-2.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0298", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:78.7.0-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-01-28T00:00:00Z"}, {"advisory": "RHSA-2021:0285", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "firefox-0:78.7.0-2.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0397", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "thunderbird-0:78.7.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-02-03T00:00:00Z"}, {"advisory": "RHSA-2021:0289", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "firefox-0:78.7.0-2.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0299", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "thunderbird-0:78.7.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-01-28T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC", "id": "1920650", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1920650"}, "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": "verified"}, "cwe": "CWE-626", "details": ["Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.", "The Mozilla Foundation Security Advisory describes this flaw as:\nPerforming garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash."], "name": "CVE-2021-23960", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 6"}], "public_date": "2021-01-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-23960\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-23960\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23960"], "threat_severity": "Moderate"}

{}