A firefox security update has been released for Red Hat Enterprise Linux 8.2.
RHSA-2021:0660-01: Critical: firefox security update
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Red Hat Security Advisory
Synopsis: Critical: firefox security update
Advisory ID: RHSA-2021:0660-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0660
Issue date: 2021-02-24
CVE Names: CVE-2021-23968 CVE-2021-23969 CVE-2021-23973
CVE-2021-23978
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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 Critical. 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 78.8.0 ESR.
Security Fix(es):
* Mozilla: Content Security Policy violation report could have contained
the destination of a redirect (CVE-2021-23968)
* Mozilla: Content Security Policy violation report could have contained
the destination of a redirect (CVE-2021-23969)
* Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8
(CVE-2021-23978)
* Mozilla: MediaError message property could have leaked information about
cross-origin resources (CVE-2021-23973)
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/):
1932109 - CVE-2021-23969 Mozilla: Content Security Policy violation report could have contained the destination of a redirect
1932110 - CVE-2021-23968 Mozilla: Content Security Policy violation report could have contained the destination of a redirect
1932111 - CVE-2021-23973 Mozilla: MediaError message property could have leaked information about cross-origin resources
1932112 - CVE-2021-23978 Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8
6. Package List:
Red Hat Enterprise Linux AppStream EUS (v. 8.2):
Source:
firefox-78.8.0-1.el8_2.src.rpm
aarch64:
firefox-78.8.0-1.el8_2.aarch64.rpm
firefox-debuginfo-78.8.0-1.el8_2.aarch64.rpm
firefox-debugsource-78.8.0-1.el8_2.aarch64.rpm
ppc64le:
firefox-78.8.0-1.el8_2.ppc64le.rpm
firefox-debuginfo-78.8.0-1.el8_2.ppc64le.rpm
firefox-debugsource-78.8.0-1.el8_2.ppc64le.rpm
s390x:
firefox-78.8.0-1.el8_2.s390x.rpm
firefox-debuginfo-78.8.0-1.el8_2.s390x.rpm
firefox-debugsource-78.8.0-1.el8_2.s390x.rpm
x86_64:
firefox-78.8.0-1.el8_2.x86_64.rpm
firefox-debuginfo-78.8.0-1.el8_2.x86_64.rpm
firefox-debugsource-78.8.0-1.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-2021-23968
https://access.redhat.com/security/cve/CVE-2021-23969
https://access.redhat.com/security/cve/CVE-2021-23973
https://access.redhat.com/security/cve/CVE-2021-23978
https://access.redhat.com/security/updates/classification/#critical
8. Contact:
The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
