Red Hat Security Advisory 2020-3833-01

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Red Hat Security Advisory

Synopsis: Important: firefox security update
Advisory ID: RHSA-2020:3833-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3833
Issue date: 2020-09-24
CVE Names: CVE-2020-15673 CVE-2020-15676 CVE-2020-15677
CVE-2020-15678
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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 Important. 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 78.3.0 ESR.

Security Fix(es):

* Mozilla: Memory safety bugs fixed in Firefox 81 and Firefox ESR 78.3
(CVE-2020-15673)

* Mozilla: XSS when pasting attacker-controlled data into a contenteditable
element (CVE-2020-15676)

* Mozilla: Download origin spoofing via redirect (CVE-2020-15677)

* Mozilla: When recursing through layers while scrolling, an iterator may
have become invalid, resulting in a potential use-after-free scenario
(CVE-2020-15678)

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/):

1881664 – CVE-2020-15677 Mozilla: Download origin spoofing via redirect
1881665 – CVE-2020-15676 Mozilla: XSS when pasting attacker-controlled data into a contenteditable element
1881666 – CVE-2020-15678 Mozilla: When recursing through layers while scrolling, an iterator may have become invalid, resulting in a potential use-after-free scenario
1881667 – CVE-2020-15673 Mozilla: Memory safety bugs fixed in Firefox 81 and Firefox ESR 78.3

6. Package List:

Red Hat Enterprise Linux AppStream EUS (v. 8.1):

Source:
firefox-78.3.0-1.el8_1.src.rpm

aarch64:
firefox-78.3.0-1.el8_1.aarch64.rpm
firefox-debuginfo-78.3.0-1.el8_1.aarch64.rpm
firefox-debugsource-78.3.0-1.el8_1.aarch64.rpm

ppc64le:
firefox-78.3.0-1.el8_1.ppc64le.rpm
firefox-debuginfo-78.3.0-1.el8_1.ppc64le.rpm
firefox-debugsource-78.3.0-1.el8_1.ppc64le.rpm

s390x:
firefox-78.3.0-1.el8_1.s390x.rpm
firefox-debuginfo-78.3.0-1.el8_1.s390x.rpm
firefox-debugsource-78.3.0-1.el8_1.s390x.rpm

x86_64:
firefox-78.3.0-1.el8_1.x86_64.rpm
firefox-debuginfo-78.3.0-1.el8_1.x86_64.rpm
firefox-debugsource-78.3.0-1.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-2020-15673
https://access.redhat.com/security/cve/CVE-2020-15676
https://access.redhat.com/security/cve/CVE-2020-15677
https://access.redhat.com/security/cve/CVE-2020-15678
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 2020 Red Hat, Inc.
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