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RedHat: RHSA-2020-3833-01 Important: Firefox Memory Safety Fixes

red hat
Calendar Grey September 24, 2020
Dist Redhat Esm H88
Major Firefox patch for Red Hat Enterprise Linux resolves several security vulnerabilities with significant consequences.
An update for firefox is now available for Red Hat Enterprise Linux 8.1 Extended Update Support

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory update red hat security fix important firefox memory safety

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

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


Severity
important
Lowest
Low
Medium
High
Critical

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

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.1Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory update red hat security fix important firefox memory safety

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream EUS (v. 8.1) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

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

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