CVE-2020-12420

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This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0."}, {"lang": "es", "value": "Al intentar conectarse a un servidor STUN, una condici\u00f3n de carrera podr\u00eda haber causado un uso de la memoria previamente liberada de un puntero, conllevando a una corrupci\u00f3n de la memoria y un bloqueo potencialmente explotable. Esta vulnerabilidad afecta a Firefox ESR versiones anteriores a 68.10, Firefox versiones anteriores a 78 y Thunderbird versiones anteriores a 68.10.0"}], "id": "CVE-2020-12420", "lastModified": "2026-06-17T02:51:48.190", "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": "2020-07-09T15:15:11.973", "references": [{"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html"}, {"source": "security@mozilla.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html"}, {"source": "security@mozilla.org", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643437"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202007-09"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202007-10"}, {"source": "security@mozilla.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4421-1/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-24/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-25/"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-26/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00023.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00026.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1643437"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202007-09"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202007-10"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4421-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-24/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-25/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2020-26/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-362"}, {"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Byron Campen as the original reporter.", "affected_release": [{"advisory": "RHSA-2020:2824", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:68.10.0-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-07-06T00:00:00Z"}, {"advisory": "RHSA-2020:2966", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "thunderbird-0:68.10.0-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-07-16T00:00:00Z"}, {"advisory": "RHSA-2020:2827", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:68.10.0-1.el7_8", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-06T00:00:00Z"}, {"advisory": "RHSA-2020:2906", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:68.10.0-1.el7_8", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-07-14T00:00:00Z"}, {"advisory": "RHSA-2020:2828", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:68.10.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-06T00:00:00Z"}, {"advisory": "RHSA-2020:3038", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "thunderbird-0:68.10.0-1.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-07-21T00:00:00Z"}, {"advisory": "RHSA-2020:2825", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "firefox-0:68.10.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-07-06T00:00:00Z"}, {"advisory": "RHSA-2020:3046", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "thunderbird-0:68.10.0-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-07-21T00:00:00Z"}, {"advisory": "RHSA-2020:2826", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "firefox-0:68.10.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-06T00:00:00Z"}, {"advisory": "RHSA-2020:2907", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "thunderbird-0:68.10.0-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-07-14T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Use-After-Free when trying to connect to a STUN server", "id": "1853017", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1853017"}, "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-416", "details": ["When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.", "The Mozilla Foundation Security Advisory describes this flaw as:\nWhen trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash."], "name": "CVE-2020-12420", "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": "2020-06-30T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-12420\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-12420\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2020-25/#CVE-2020-12420"], "threat_severity": "Important"}

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