A firefox security update has been released for Red Hat Enterprise Linux 8.1.
RHSA-2021:0991-01: Important: firefox security update
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Red Hat Security Advisory
Synopsis: Important: firefox security update
Advisory ID: RHSA-2021:0991-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0991
Issue date: 2021-03-25
CVE Names: CVE-2021-23981 CVE-2021-23982 CVE-2021-23984
CVE-2021-23987
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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 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. 8.1) - 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 78.9.0 ESR.
Security Fix(es):
* Mozilla: Texture upload into an unbound backing buffer resulted in an
out-of-bound read (CVE-2021-23981)
* Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9
(CVE-2021-23987)
* Mozilla: Internal network hosts could have been probed by a malicious
webpage (CVE-2021-23982)
* Mozilla: Malicious extensions could have spoofed popup information
(CVE-2021-23984)
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/):
1942783 - CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read
1942785 - CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage
1942786 - CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information
1942787 - CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9
6. Package List:
Red Hat Enterprise Linux AppStream EUS (v. 8.1):
Source:
firefox-78.9.0-1.el8_1.src.rpm
aarch64:
firefox-78.9.0-1.el8_1.aarch64.rpm
firefox-debuginfo-78.9.0-1.el8_1.aarch64.rpm
firefox-debugsource-78.9.0-1.el8_1.aarch64.rpm
ppc64le:
firefox-78.9.0-1.el8_1.ppc64le.rpm
firefox-debuginfo-78.9.0-1.el8_1.ppc64le.rpm
firefox-debugsource-78.9.0-1.el8_1.ppc64le.rpm
s390x:
firefox-78.9.0-1.el8_1.s390x.rpm
firefox-debuginfo-78.9.0-1.el8_1.s390x.rpm
firefox-debugsource-78.9.0-1.el8_1.s390x.rpm
x86_64:
firefox-78.9.0-1.el8_1.x86_64.rpm
firefox-debuginfo-78.9.0-1.el8_1.x86_64.rpm
firefox-debugsource-78.9.0-1.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-2021-23981
https://access.redhat.com/security/cve/CVE-2021-23982
https://access.redhat.com/security/cve/CVE-2021-23984
https://access.redhat.com/security/cve/CVE-2021-23987
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.
