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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Rob Wu 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: Cross-origin information leakage via redirected PDF requests", "id": "1920646", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1920646"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "status": "verified"}, "cwe": "CWE-829", "details": ["If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.", "The Mozilla Foundation Security Advisory describes this flaw as:\nIf a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-origin information, when said information is served as chunked data."], "name": "CVE-2021-23953", "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-2021-23953\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-23953\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2021-04/#CVE-2021-23953"], "threat_severity": "Important", "upstream_fix": "thunderbird 78.7, firefox 78.7"}