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RedHat: RHSA-2021-5013-03 Important: Firefox Memory Safety Fixes and DoS

red hat
Calendar Grey December 8, 2021
Scroller Redhat
Essential Firefox patch for Red Hat Enterprise Linux addresses significant memory security vulnerabilities and denial-of-service concerns. Keep your system secure!
An update for firefox is now available for Red Hat Enterprise Linux 8

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, Firefox must be restarted for the changes to take effect.

Summary

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.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow software update DoS firefox memory safety

References

https://access.redhat.com/security/cve/CVE-2021-43536 https://access.redhat.com/security/cve/CVE-2021-43537 https://access.redhat.com/security/cve/CVE-2021-43538 https://access.redhat.com/security/cve/CVE-2021-43539 https://access.redhat.com/security/cve/CVE-2021-43541 https://access.redhat.com/security/cve/CVE-2021-43542 https://access.redhat.com/security/cve/CVE-2021-43543 https://access.redhat.com/security/cve/CVE-2021-43545 https://access.redhat.com/security/cve/CVE-2021-43546 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: firefox-91.4.0-1.el8_5.src.rpm
aarch64: firefox-91.4.0-1.el8_5.aarch64.rpm firefox-debuginfo-91.4.0-1.el8_5.aarch64.rpm firefox-debugsource-91.4.0-1.el8_5.aarch64.rpm
ppc64le: firefox-91.4.0-1.el8_5.ppc64le.rpm firefox-debuginfo-91.4.0-1.el8_5.ppc64le.rpm firefox-debugsource-91.4.0-1.el8_5.ppc64le.rpm
s390x: firefox-91.4.0-1.el8_5.s390x.rpm firefox-debuginfo-91.4.0-1.el8_5.s390x.rpm firefox-debugsource-91.4.0-1.el8_5.s390x.rpm
x86_64: firefox-91.4.0-1.el8_5.x86_64.rpm firefox-debuginfo-91.4.0-1.el8_5.x86_64.rpm firefox-debugsource-91.4.0-1.el8_5.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2021:5013-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:5013
Issue date: 2021-12-08

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat buffer overflow software update DoS firefox memory safety

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

2030105 - CVE-2021-43536 Mozilla: URL leakage when navigating while executing asynchronous function

2030106 - CVE-2021-43537 Mozilla: Heap buffer overflow when using structured clone

2030109 - CVE-2021-43538 Mozilla: Missing fullscreen and pointer lock notification when requesting both

2030110 - CVE-2021-43539 Mozilla: GC rooting failure when calling wasm instance methods

2030111 - CVE-2021-43541 Mozilla: External protocol handler parameters were unescaped

2030112 - CVE-2021-43542 Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler

2030113 - CVE-2021-43543 Mozilla: Bypass of CSP sandbox directive when embedding

2030114 - CVE-2021-43545 Mozilla: Denial of Service when using the Location API in a loop

2030115 - CVE-2021-43546 Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed

2030116 - Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

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