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Critical Security Update RHSA-2021:1363-01 for Firefox on RHEL 7

red hat
Calendar Grey April 26, 2021
Dist Redhat Esm H88
An important update for Firefox released for Red Hat Enterprise Linux 7 fixes significant security vulnerabilities. Prompt installation is advised.
An update for firefox is now available for Red Hat Enterprise Linux 7

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 security update Red Hat important firefox web browser

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 Client (v. 7):
Source: firefox-78.10.0-1.el7_9.src.rpm
x86_64: firefox-78.10.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.10.0-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: firefox-78.10.0-1.el7_9.i686.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: firefox-78.10.0-1.el7_9.src.rpm
ppc64: firefox-78.10.0-1.el7_9.ppc64.rpm firefox-debuginfo-78.10.0-1.el7_9.ppc64.rpm
ppc64le: firefox-78.10.0-1.el7_9.ppc64le.rpm firefox-debuginfo-78.10.0-1.el7_9.ppc64le.rpm
s390x: firefox-78.10.0-1.el7_9.s390x.rpm firefox-debuginfo-78.10.0-1.el7_9.s390x.rpm
x86_64: firefox-78.10.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.10.0-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
x86_64: firefox-78.10.0-1.el7_9.i686.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: firefox-78.10.0-1.el7_9.src.rpm
x86_64: firefox-78.10.0-1.el7_9.x86_64.rpm firefox-debuginfo-78.10.0-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 7):
x86_64: firefox-78.10.0-1.el7_9.i686.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-2021:1363-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1363
Issue date: 2021-04-26

Topic

An update for firefox is now available for Red Hat Enterprise Linux 7.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 update Red Hat important firefox web browser

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - 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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