RedHat: RHSA-2021-0285:01 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 78.7.0 ESR.
Security Fix(es):
* Mozilla: Cross-origin information leakage via redirected PDF requests
(CVE-2021-23953)
* Mozilla: Type confusion when using logical assignment operators in
JavaScript switch statements (CVE-2021-23954)
* Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
(CVE-2021-23964)
* Mozilla: HTTPS pages could have been intercepted by a registered service
worker when they should not have been (CVE-2020-26976)
* Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables
during GC (CVE-2021-23960)
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-2020-26976 https://access.redhat.com/security/cve/CVE-2021-23953 https://access.redhat.com/security/cve/CVE-2021-23954 https://access.redhat.com/security/cve/CVE-2021-23960 https://access.redhat.com/security/cve/CVE-2021-23964 https://access.redhat.com/security/updates/classification/#important
Package List
Red Hat Enterprise Linux AppStream EUS (v. 8.1):
Source:
firefox-78.7.0-2.el8_1.src.rpm
aarch64:
firefox-78.7.0-2.el8_1.aarch64.rpm
firefox-debuginfo-78.7.0-2.el8_1.aarch64.rpm
firefox-debugsource-78.7.0-2.el8_1.aarch64.rpm
ppc64le:
firefox-78.7.0-2.el8_1.ppc64le.rpm
firefox-debuginfo-78.7.0-2.el8_1.ppc64le.rpm
firefox-debugsource-78.7.0-2.el8_1.ppc64le.rpm
s390x:
firefox-78.7.0-2.el8_1.s390x.rpm
firefox-debuginfo-78.7.0-2.el8_1.s390x.rpm
firefox-debugsource-78.7.0-2.el8_1.s390x.rpm
x86_64:
firefox-78.7.0-2.el8_1.x86_64.rpm
firefox-debuginfo-78.7.0-2.el8_1.x86_64.rpm
firefox-debugsource-78.7.0-2.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/
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.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AppStream EUS (v. 8.1) - aarch64, ppc64le, s390x, x86_64
Bugs Fixed
1920646 - CVE-2021-23953 Mozilla: Cross-origin information leakage via redirected PDF requests
1920648 - CVE-2021-23954 Mozilla: Type confusion when using logical assignment operators in JavaScript switch statements
1920649 - CVE-2020-26976 Mozilla: HTTPS pages could have been intercepted by a registered service worker when they should not have been
1920650 - CVE-2021-23960 Mozilla: Use-after-poison for incorrectly redeclared JavaScript variables during GC
1920651 - CVE-2021-23964 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
