RedHat: RHSA-2021-3756:01 Important: firefox security update
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.
Summary
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.
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 EUS (v. 8.2):
Source:
firefox-91.2.0-4.el8_2.src.rpm
aarch64:
firefox-91.2.0-4.el8_2.aarch64.rpm
firefox-debuginfo-91.2.0-4.el8_2.aarch64.rpm
firefox-debugsource-91.2.0-4.el8_2.aarch64.rpm
ppc64le:
firefox-91.2.0-4.el8_2.ppc64le.rpm
firefox-debuginfo-91.2.0-4.el8_2.ppc64le.rpm
firefox-debugsource-91.2.0-4.el8_2.ppc64le.rpm
s390x:
firefox-91.2.0-4.el8_2.s390x.rpm
firefox-debuginfo-91.2.0-4.el8_2.s390x.rpm
firefox-debugsource-91.2.0-4.el8_2.s390x.rpm
x86_64:
firefox-91.2.0-4.el8_2.x86_64.rpm
firefox-debuginfo-91.2.0-4.el8_2.x86_64.rpm
firefox-debugsource-91.2.0-4.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/
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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream EUS (v. 8.2) - 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
