-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

=====================================================================
                   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 
=====================================================================

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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2021 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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=G1ep
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://listman.redhat.com/mailman/listinfo/rhsa-announce