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{"acknowledgement": "Red Hat would like to thank Mozilla project for reporting this issue. Upstream acknowledges Ehsan Akhgari as the original reporter.", "affected_release": [{"advisory": "RHSA-2015:1834", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "firefox-0:38.3.0-2.el5_11", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2015-09-22T00:00:00Z"}, {"advisory": "RHSA-2015:1852", "cpe": "cpe:/o:redhat:enterprise_linux:5", "package": "thunderbird-0:38.3.0-1.el5_11", "product_name": "Red Hat Enterprise Linux 5", "release_date": "2015-10-01T00:00:00Z"}, {"advisory": "RHSA-2015:1834", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:38.3.0-2.el6_7", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2015-09-22T00:00:00Z"}, {"advisory": "RHSA-2015:1852", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "thunderbird-0:38.3.0-1.el6_7", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2015-10-01T00:00:00Z"}, {"advisory": "RHSA-2015:1834", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:38.3.0-2.el7_1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-09-22T00:00:00Z"}, {"advisory": "RHSA-2015:1852", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "thunderbird-0:38.3.0-1.ael7b_1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-10-01T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Errors in the handling of CORS preflight request headers (MFSA 2015-111)", "id": "1265781", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1265781"}, "csaw": false, "cvss": {"cvss_base_score": "6.8", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "status": "verified"}, "cwe": "CWE-284", "details": ["Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header."], "name": "CVE-2015-4520", "public_date": "2015-09-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-4520\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-4520\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2015-111/"], "threat_severity": "Important"}