RHSA-2020:0111 — Security Advisory

Red Hat Security Advisory: firefox security update

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Severity

Critical

Red Hat Product Security

RHEL 8

Products

Official CSAF product identity

Published · January 15, 2020

Updated · November 22, 2025

Topic

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.

Description

Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and portability.

This update upgrades Firefox to version 68.4.1 ESR.

Security Fix(es):

Mozilla: IonMonkey type confusion with StoreElementHole and FallibleStoreElement (CVE-2019-17026)
Mozilla: Bypass of @namespace CSS sanitization during pasting (CVE-2019-17016)
Mozilla: Type Confusion in XPCVariant.cpp (CVE-2019-17017)
Mozilla: Memory safety bugs fixed in Firefox 72 and Firefox ESR 68.4 (CVE-2019-17024)
Mozilla: CSS sanitization does not escape HTML tags (CVE-2019-17022)

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.