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Red Hat Enterprise Linux 8: RHSA-2021:3755-01 Firefox Important Memory Safety

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Calendar Grey October 11, 2021
Scroller Redhat
Explore the latest Important security update for Firefox on Red Hat Enterprise Linux 8 addressing memory safety issues.
An update for firefox is now available for Red Hat Enterprise Linux 8

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 91.2.0 ESR.
Security Fix(es):
* Mozilla: Use-after-free in MessageTask (CVE-2021-38496)
* Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2 (CVE-2021-38500)
* Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2 (CVE-2021-38501)
* rust-crossbeam-deque: race condition may lead to double free (CVE-2021-32810)
* Mozilla: Validation message could have been overlaid on another origin (CVE-2021-38497)
* Mozilla: Use-after-free of nsLanguageAtomService object (CVE-2021-38498)
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 red hat enterprise important fix memory safety firefox update

References

https://access.redhat.com/security/cve/CVE-2021-32810 https://access.redhat.com/security/cve/CVE-2021-38496 https://access.redhat.com/security/cve/CVE-2021-38497 https://access.redhat.com/security/cve/CVE-2021-38498 https://access.redhat.com/security/cve/CVE-2021-38500 https://access.redhat.com/security/cve/CVE-2021-38501 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: firefox-91.2.0-4.el8_4.src.rpm
aarch64: firefox-91.2.0-4.el8_4.aarch64.rpm firefox-debuginfo-91.2.0-4.el8_4.aarch64.rpm firefox-debugsource-91.2.0-4.el8_4.aarch64.rpm
ppc64le: firefox-91.2.0-4.el8_4.ppc64le.rpm firefox-debuginfo-91.2.0-4.el8_4.ppc64le.rpm firefox-debugsource-91.2.0-4.el8_4.ppc64le.rpm
s390x: firefox-91.2.0-4.el8_4.s390x.rpm firefox-debuginfo-91.2.0-4.el8_4.s390x.rpm firefox-debugsource-91.2.0-4.el8_4.s390x.rpm
x86_64: firefox-91.2.0-4.el8_4.x86_64.rpm firefox-debuginfo-91.2.0-4.el8_4.x86_64.rpm firefox-debugsource-91.2.0-4.el8_4.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-2021:3755-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:3755
Issue date: 2021-10-11

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 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 red hat enterprise important fix memory safety firefox update

Relevant Releases Architectures

Red Hat Enterprise Linux AppStream (v. 8) - aarch64, ppc64le, s390x, x86_64

Bugs Fixed

1990342 - CVE-2021-32810 rust-crossbeam-deque: race condition may lead to double free

2011097 - CVE-2021-38496 Mozilla: Use-after-free in MessageTask

2011098 - CVE-2021-38497 Mozilla: Validation message could have been overlaid on another origin

2011099 - CVE-2021-38498 Mozilla: Use-after-free of nsLanguageAtomService object

2011100 - CVE-2021-38500 Mozilla: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2

2011101 - CVE-2021-38501 Mozilla: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2

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