Alerts This Week
Warning Icon 1 727
Alerts This Week
Warning Icon 1 727

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

red hat
Calendar Grey December 8, 2021
Dist Redhat Esm H88
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

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here