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RedHat: RHSA-2021-0285:01 Important: firefox security update

Date 27 Jan 2021
198
Posted By LinuxSecurity Advisories
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,
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: firefox security update
Advisory ID:       RHSA-2021:0285-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0285
Issue date:        2021-01-27
CVE Names:         CVE-2020-26976 CVE-2021-23953 CVE-2021-23954 
                   CVE-2021-23960 CVE-2021-23964 
=====================================================================

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 78.7.0 ESR.

Security Fix(es):

* Mozilla: Cross-origin information leakage via redirected PDF requests
(CVE-2021-23953)

* Mozilla: Type confusion when using logical assignment operators in
JavaScript switch statements (CVE-2021-23954)

* Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
(CVE-2021-23964)

* Mozilla: HTTPS pages could have been intercepted by a registered service
worker when they should not have been (CVE-2020-26976)

* Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables
during GC (CVE-2021-23960)

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/):

1920646 - CVE-2021-23953 Mozilla: Cross-origin information leakage via redirected PDF requests
1920648 - CVE-2021-23954 Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements
1920649 - CVE-2020-26976 Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been
1920650 - CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC
1920651 - CVE-2021-23964 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7

6. Package List:

Red Hat Enterprise Linux AppStream EUS (v. 8.1):

Source:
firefox-78.7.0-2.el8_1.src.rpm

aarch64:
firefox-78.7.0-2.el8_1.aarch64.rpm
firefox-debuginfo-78.7.0-2.el8_1.aarch64.rpm
firefox-debugsource-78.7.0-2.el8_1.aarch64.rpm

ppc64le:
firefox-78.7.0-2.el8_1.ppc64le.rpm
firefox-debuginfo-78.7.0-2.el8_1.ppc64le.rpm
firefox-debugsource-78.7.0-2.el8_1.ppc64le.rpm

s390x:
firefox-78.7.0-2.el8_1.s390x.rpm
firefox-debuginfo-78.7.0-2.el8_1.s390x.rpm
firefox-debugsource-78.7.0-2.el8_1.s390x.rpm

x86_64:
firefox-78.7.0-2.el8_1.x86_64.rpm
firefox-debuginfo-78.7.0-2.el8_1.x86_64.rpm
firefox-debugsource-78.7.0-2.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-2020-26976
https://access.redhat.com/security/cve/CVE-2021-23953
https://access.redhat.com/security/cve/CVE-2021-23954
https://access.redhat.com/security/cve/CVE-2021-23960
https://access.redhat.com/security/cve/CVE-2021-23964
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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