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Red Hat Security Advisory 2021-5016-03

Red Hat Security Advisory 2021-5016-03
Posted Dec 8, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-5016-03 - 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. Issues addressed include buffer overflow, bypass, denial of service, and spoofing vulnerabilities.

tags | advisory, web, denial of service, overflow, spoof, vulnerability
systems | linux, redhat
advisories | 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
SHA-256 | d270e2edb8cf44801a3f262428601f6743fd5ebf1de5221bfaca2d4922230ac2

Red Hat Security Advisory 2021-5016-03

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: firefox security update
Advisory ID: RHSA-2021:5016-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:5016
Issue date: 2021-12-08
CVE Names: 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
=====================================================================

1. Summary:

An update for firefox is now available for Red Hat Enterprise Linux 8.2
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64

3. Description:

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.

4. 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.

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux AppStream EUS (v. 8.2):

Source:
firefox-91.4.0-1.el8_2.src.rpm

aarch64:
firefox-91.4.0-1.el8_2.aarch64.rpm
firefox-debuginfo-91.4.0-1.el8_2.aarch64.rpm
firefox-debugsource-91.4.0-1.el8_2.aarch64.rpm

ppc64le:
firefox-91.4.0-1.el8_2.ppc64le.rpm
firefox-debuginfo-91.4.0-1.el8_2.ppc64le.rpm
firefox-debugsource-91.4.0-1.el8_2.ppc64le.rpm

s390x:
firefox-91.4.0-1.el8_2.s390x.rpm
firefox-debuginfo-91.4.0-1.el8_2.s390x.rpm
firefox-debugsource-91.4.0-1.el8_2.s390x.rpm

x86_64:
firefox-91.4.0-1.el8_2.x86_64.rpm
firefox-debuginfo-91.4.0-1.el8_2.x86_64.rpm
firefox-debugsource-91.4.0-1.el8_2.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/

7. 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

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
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