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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: firefox security update
Advisory ID:       RHSA-2021:0990-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:0990
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.

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 (v. 8) - 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 (v. 8):

Source:
firefox-78.9.0-1.el8_3.src.rpm

aarch64:
firefox-78.9.0-1.el8_3.aarch64.rpm
firefox-debuginfo-78.9.0-1.el8_3.aarch64.rpm
firefox-debugsource-78.9.0-1.el8_3.aarch64.rpm

ppc64le:
firefox-78.9.0-1.el8_3.ppc64le.rpm
firefox-debuginfo-78.9.0-1.el8_3.ppc64le.rpm
firefox-debugsource-78.9.0-1.el8_3.ppc64le.rpm

s390x:
firefox-78.9.0-1.el8_3.s390x.rpm
firefox-debuginfo-78.9.0-1.el8_3.s390x.rpm
firefox-debugsource-78.9.0-1.el8_3.s390x.rpm

x86_64:
firefox-78.9.0-1.el8_3.x86_64.rpm
firefox-debuginfo-78.9.0-1.el8_3.x86_64.rpm
firefox-debugsource-78.9.0-1.el8_3.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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=EUt2
-----END PGP SIGNATURE-----

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