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Red Hat Enterprise Linux 7: RHSA-2021-0996-01 Important: Thunderbird Update

red hat
Calendar Grey March 25, 2021
Dist Redhat Esm H88
Crucial patch released for Mozilla Thunderbird on Red Hat Enterprise Linux 7 tackling various security vulnerabilities.
An update for thunderbird 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

All running instances of Thunderbird must be restarted for the update to take effect.

Summary

Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 78.9.0.
Security Fix(es):
* Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read (CVE-2021-23981)
* Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9 (CVE-2021-23987)
* Mozilla: Internal network hosts could have been probed by a malicious webpage (CVE-2021-23982)
* Mozilla: Malicious extensions could have spoofed popup information (CVE-2021-23984)
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 buffer overflow red hat important memory safety thunderbird update

References

https://access.redhat.com/security/cve/CVE-2021-23981 https://access.redhat.com/security/cve/CVE-2021-23982 https://access.redhat.com/security/cve/CVE-2021-23984 https://access.redhat.com/security/cve/CVE-2021-23987 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: thunderbird-78.9.0-3.el7_9.src.rpm
x86_64: thunderbird-78.9.0-3.el7_9.x86_64.rpm thunderbird-debuginfo-78.9.0-3.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
Source: thunderbird-78.9.0-3.el7_9.src.rpm
ppc64le: thunderbird-78.9.0-3.el7_9.ppc64le.rpm thunderbird-debuginfo-78.9.0-3.el7_9.ppc64le.rpm
x86_64: thunderbird-78.9.0-3.el7_9.x86_64.rpm thunderbird-debuginfo-78.9.0-3.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: thunderbird-78.9.0-3.el7_9.src.rpm
x86_64: thunderbird-78.9.0-3.el7_9.x86_64.rpm thunderbird-debuginfo-78.9.0-3.el7_9.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-2021:0996-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:0996
Issue date: 2021-03-25

Topic

An update for thunderbird 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 issue buffer overflow red hat important memory safety thunderbird update

Relevant Releases Architectures

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

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

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

Bugs Fixed

1942783 - CVE-2021-23981 Mozilla: Texture upload into an unbound backing buffer resulted in an out-of-bound read

1942785 - CVE-2021-23982 Mozilla: Internal network hosts could have been probed by a malicious webpage

1942786 - CVE-2021-23984 Mozilla: Malicious extensions could have spoofed popup information

1942787 - CVE-2021-23987 Mozilla: Memory safety bugs fixed in Firefox 87 and Firefox ESR 78.9

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