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Red Hat Security Advisory
Synopsis: Important: firefox security update
Advisory ID: RHSA-2021:3757-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3757
Issue date: 2021-10-11
CVE Names: CVE-2021-32810 CVE-2021-38496 CVE-2021-38497
CVE-2021-38498 CVE-2021-38500 CVE-2021-38501
=====================================================================
1. Summary:
An update for firefox is now available for Red Hat Enterprise Linux 8.1
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. 8.1) - 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 91.2.0 ESR.
Security Fix(es):
* Mozilla: Use-after-free in MessageTask (CVE-2021-38496)
* Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and
Firefox ESR 91.2 (CVE-2021-38500)
* Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2
(CVE-2021-38501)
* rust-crossbeam-deque: race condition may lead to double free
(CVE-2021-32810)
* Mozilla: Validation message could have been overlaid on another origin
(CVE-2021-38497)
* Mozilla: Use-after-free of nsLanguageAtomService object (CVE-2021-38498)
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/):
1990342 - CVE-2021-32810 rust-crossbeam-deque: race condition may lead to
double free
2011097 - CVE-2021-38496 Mozilla: Use-after-free in MessageTask
2011098 - CVE-2021-38497 Mozilla: Validation message could have been overlaid
on another origin
2011099 - CVE-2021-38498 Mozilla: Use-after-free of nsLanguageAtomService
object
2011100 - CVE-2021-38500 Mozilla: Memory safety bugs fixed in Firefox 93,
Firefox ESR 78.15, and Firefox ESR 91.2
2011101 - CVE-2021-38501 Mozilla: Memory safety bugs fixed in Firefox 93 and
Firefox ESR 91.2
6. Package List:
Red Hat Enterprise Linux AppStream EUS (v. 8.1):
Source:
firefox-91.2.0-4.el8_1.src.rpm
aarch64:
firefox-91.2.0-4.el8_1.aarch64.rpm
firefox-debuginfo-91.2.0-4.el8_1.aarch64.rpm
firefox-debugsource-91.2.0-4.el8_1.aarch64.rpm
ppc64le:
firefox-91.2.0-4.el8_1.ppc64le.rpm
firefox-debuginfo-91.2.0-4.el8_1.ppc64le.rpm
firefox-debugsource-91.2.0-4.el8_1.ppc64le.rpm
s390x:
firefox-91.2.0-4.el8_1.s390x.rpm
firefox-debuginfo-91.2.0-4.el8_1.s390x.rpm
firefox-debugsource-91.2.0-4.el8_1.s390x.rpm
x86_64:
firefox-91.2.0-4.el8_1.x86_64.rpm
firefox-debuginfo-91.2.0-4.el8_1.x86_64.rpm
firefox-debugsource-91.2.0-4.el8_1.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-2021-32810
https://access.redhat.com/security/cve/CVE-2021-38496
https://access.redhat.com/security/cve/CVE-2021-38497
https://access.redhat.com/security/cve/CVE-2021-38498
https://access.redhat.com/security/cve/CVE-2021-38500
https://access.redhat.com/security/cve/CVE-2021-38501
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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