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Red Hat 7 RHSA-2021-0290 Important: Firefox Security Update

red hat
Calendar Grey January 27, 2021
Dist Redhat Esm H88
Ubuntu 20.04 brings significant Chromium upgrade addressing vulnerabilities related to performance flaws and data protection breaches.
An update for firefox is now available for Red Hat Enterprise Linux 7

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 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.

Topics%20covered

Topics Covered

security advisory information leak update important firefox red hat enterprise linux red hat enterprise memory safety

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

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: firefox-78.7.0-2.el7_9.src.rpm
x86_64: firefox-78.7.0-2.el7_9.x86_64.rpm firefox-debuginfo-78.7.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: firefox-78.7.0-2.el7_9.i686.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: firefox-78.7.0-2.el7_9.src.rpm
ppc64: firefox-78.7.0-2.el7_9.ppc64.rpm firefox-debuginfo-78.7.0-2.el7_9.ppc64.rpm
ppc64le: firefox-78.7.0-2.el7_9.ppc64le.rpm firefox-debuginfo-78.7.0-2.el7_9.ppc64le.rpm
s390x: firefox-78.7.0-2.el7_9.s390x.rpm firefox-debuginfo-78.7.0-2.el7_9.s390x.rpm
x86_64: firefox-78.7.0-2.el7_9.x86_64.rpm firefox-debuginfo-78.7.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
x86_64: firefox-78.7.0-2.el7_9.i686.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: firefox-78.7.0-2.el7_9.src.rpm
x86_64: firefox-78.7.0-2.el7_9.x86_64.rpm firefox-debuginfo-78.7.0-2.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64: firefox-78.7.0-2.el7_9.i686.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-2021:0290-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0290
Issue date: 2021-01-27

Topic

An update for firefox is now available for Red Hat Enterprise Linux 7.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 information leak update important firefox red hat enterprise linux red hat enterprise memory safety

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

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

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