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Red Hat Enterprise Linux: RHSA-2020:5563 Important: Firefox Update Critical

red hat
Calendar Grey December 16, 2020
Dist Redhat Esm H88
Canonical announces a crucial patch for Chromium on Ubuntu Desktop. Update now to maintain security standards.
An update for firefox is now available for Red Hat Enterprise Linux 8.2 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 78.6.0 ESR.
Security Fix(es):
* chromium-browser: Uninitialized Use in V8 (CVE-2020-16042)
* Mozilla: Heap buffer overflow in WebGL (CVE-2020-26971)
* Mozilla: CSS Sanitizer performed incorrect sanitization (CVE-2020-26973)
* Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free (CVE-2020-26974)
* Mozilla: Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6 (CVE-2020-35113)
* Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2020-26978)
* Mozilla: The proxy.onRequest API did not catch view-source URLs (CVE-2020-35111)
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 security issue update buffer overflow red hat Red Hat Enterprise Linux critical update important heap overflow firefox web security web browser

References

https://access.redhat.com/security/cve/CVE-2020-16042 https://access.redhat.com/security/cve/CVE-2020-26971 https://access.redhat.com/security/cve/CVE-2020-26973 https://access.redhat.com/security/cve/CVE-2020-26974 https://access.redhat.com/security/cve/CVE-2020-26978 https://access.redhat.com/security/cve/CVE-2020-35111 https://access.redhat.com/security/cve/CVE-2020-35113 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream EUS (v. 8.2):
Source: firefox-78.6.0-1.el8_2.src.rpm
aarch64: firefox-78.6.0-1.el8_2.aarch64.rpm firefox-debuginfo-78.6.0-1.el8_2.aarch64.rpm firefox-debugsource-78.6.0-1.el8_2.aarch64.rpm
ppc64le: firefox-78.6.0-1.el8_2.ppc64le.rpm firefox-debuginfo-78.6.0-1.el8_2.ppc64le.rpm firefox-debugsource-78.6.0-1.el8_2.ppc64le.rpm
s390x: firefox-78.6.0-1.el8_2.s390x.rpm firefox-debuginfo-78.6.0-1.el8_2.s390x.rpm firefox-debugsource-78.6.0-1.el8_2.s390x.rpm
x86_64: firefox-78.6.0-1.el8_2.x86_64.rpm firefox-debuginfo-78.6.0-1.el8_2.x86_64.rpm firefox-debugsource-78.6.0-1.el8_2.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-2020:5563-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:5563
Issue date: 2020-12-16

Topic

An update for firefox is now available for Red Hat Enterprise Linux 8.2Extended 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 security issue update buffer overflow red hat Red Hat Enterprise Linux critical update important heap overflow firefox web security web browser

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1904515 - CVE-2020-16042 chromium-browser: Uninitialized Use in V8

1908022 - CVE-2020-26971 Mozilla: Heap buffer overflow in WebGL

1908023 - CVE-2020-26973 Mozilla: CSS Sanitizer performed incorrect sanitization

1908024 - CVE-2020-26974 Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free

1908025 - CVE-2020-26978 Mozilla: Internal network hosts could have been probed by a malicious webpage

1908027 - CVE-2020-35111 Mozilla: The proxy.onRequest API did not catch view-source URLs

1908029 - CVE-2020-35113 Mozilla: Memory safety bugs fixed in Firefox 84 and Firefox ESR 78.6

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