{"id":"ALSA-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":"2026-01-30T00:28:54.632662Z","published":"2021-12-08T09:42:58Z","related":["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":"REPORT","url":"https://vulners.com/cve/CVE-2021-43536"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43537"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43538"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43539"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43541"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43542"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43543"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43545"},{"type":"REPORT","url":"https://vulners.com/cve/CVE-2021-43546"}],"affected":[{"package":{"name":"firefox","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/firefox"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"91.4.0-1.el8_5.alma"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2021:5013.json"}}],"schema_version":"1.7.3"}