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RHEL 8: RHSA-2021-1360-01 Critical: Firefox Security Update

red hat
Calendar Grey April 26, 2021
Dist Redhat Esm H88
Crucial Firefox patch for Red Hat Enterprise Linux resolves multiple severe vulnerabilities requiring urgent attention.
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 78.10.0 ESR.
Security Fix(es):
* Mozilla: Out of bound write due to lazy initialization (CVE-2021-23994)
* Mozilla: Use-after-free in Responsive Design Mode (CVE-2021-23995)
* Mozilla: More internal network hosts could have been probed by a malicious webpage (CVE-2021-23961)
* Mozilla: Secure Lock icon could have been spoofed (CVE-2021-23998)
* Mozilla: Blob URLs may have been granted additional privileges (CVE-2021-23999)
* Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL (CVE-2021-24002)
* Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads (CVE-2021-29945)
* Mozilla: Port blocking could be bypassed (CVE-2021-29946)
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 critical Red Hat Enterprise Linux important firefox security impact

References

https://access.redhat.com/security/cve/CVE-2021-23961 https://access.redhat.com/security/cve/CVE-2021-23994 https://access.redhat.com/security/cve/CVE-2021-23995 https://access.redhat.com/security/cve/CVE-2021-23998 https://access.redhat.com/security/cve/CVE-2021-23999 https://access.redhat.com/security/cve/CVE-2021-24002 https://access.redhat.com/security/cve/CVE-2021-29945 https://access.redhat.com/security/cve/CVE-2021-29946 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: firefox-78.10.0-1.el8_3.src.rpm
aarch64: firefox-78.10.0-1.el8_3.aarch64.rpm firefox-debuginfo-78.10.0-1.el8_3.aarch64.rpm firefox-debugsource-78.10.0-1.el8_3.aarch64.rpm
ppc64le: firefox-78.10.0-1.el8_3.ppc64le.rpm firefox-debuginfo-78.10.0-1.el8_3.ppc64le.rpm firefox-debugsource-78.10.0-1.el8_3.ppc64le.rpm
s390x: firefox-78.10.0-1.el8_3.s390x.rpm firefox-debuginfo-78.10.0-1.el8_3.s390x.rpm firefox-debugsource-78.10.0-1.el8_3.s390x.rpm
x86_64: firefox-78.10.0-1.el8_3.x86_64.rpm firefox-debuginfo-78.10.0-1.el8_3.x86_64.rpm firefox-debugsource-78.10.0-1.el8_3.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-2021:1360-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1360
Issue date: 2021-04-26

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 update critical Red Hat Enterprise Linux important firefox security impact

Relevant Releases Architectures

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

Bugs Fixed

1951364 - CVE-2021-23994 Mozilla: Out of bound write due to lazy initialization

1951365 - CVE-2021-23995 Mozilla: Use-after-free in Responsive Design Mode

1951366 - CVE-2021-23998 Mozilla: Secure Lock icon could have been spoofed

1951367 - CVE-2021-23961 Mozilla: More internal network hosts could have been probed by a malicious webpage

1951368 - CVE-2021-23999 Mozilla: Blob URLs may have been granted additional privileges

1951369 - CVE-2021-24002 Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL

1951370 - CVE-2021-29945 Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads

1951371 - CVE-2021-29946 Mozilla: Port blocking could be bypassed

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