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osvGoogleOSV:RLSA-2021:5013
HistoryDec 08, 2021 - 9:42 a.m.

Important: firefox security update

2021-12-0809:42:58
Google
osv.dev
9
mozilla firefox
security update
version 91.4.0 esr
memory safety bugs
url leakage
heap buffer overflow
fullscreen notification
pointer lock notification
gc rooting failure
external protocol handler
xmlhttprequest error codes
csp sandbox directive
denial of service
cursor spoofing

EPSS

0.019

Percentile

88.8%

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 91.4.0 ESR.

Security Fix(es):

  • Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

  • Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

  • Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

  • Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

  • Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

  • Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

  • Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler (CVE-2021-43542)

  • Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

  • Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

  • Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

For 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.