{"id":"RLSA-2021:5013","summary":"Important: firefox security update","details":"Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.\n\nThis update upgrades Firefox to version 91.4.0 ESR.\n\nSecurity Fix(es):\n\n* Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4\n\n* Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)\n\n* Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)\n\n* Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)\n\n* Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)\n\n* Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)\n\n* Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)\n\n* Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)\n\n* Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)\n\n* Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-02-04T19:15:12.910579Z","published":"2021-12-08T09:42:58Z","upstream":["CVE-2021-4129","CVE-2021-43536","CVE-2021-43537","CVE-2021-43538","CVE-2021-43539","CVE-2021-43541","CVE-2021-43542","CVE-2021-43543","CVE-2021-43545","CVE-2021-43546"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2021:5013"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030105"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030106"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030109"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030110"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030111"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030112"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030113"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030114"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030115"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2030116"}],"affected":[{"package":{"name":"firefox","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/firefox?distro=rocky-linux-8-5-legacy&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:91.4.0-1.el8_5"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2021:5013.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}