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Red Hat Security Advisory
Synopsis: Moderate: thunderbird security update
Advisory ID: RHSA-2021:1192-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1192
Issue date: 2021-04-14
CVE Names: CVE-2021-23991 CVE-2021-23992 CVE-2021-23993
=====================================================================
1. Summary:
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 impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.
2. 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
3. Description:
Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 78.9.1.
Security Fix(es):
* Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism
to poison an existing key (CVE-2021-23991)
* Mozilla: A crafted OpenPGP key with an invalid user ID could be used to
confuse the user (CVE-2021-23992)
* Mozilla: Inability to send encrypted OpenPGP email after importing a
crafted OpenPGP key (CVE-2021-23993)
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.
4. 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.
5. Bugs fixed (https://bugzilla.redhat.com/):
1948393 - CVE-2021-23991 Mozilla: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key
1948394 - CVE-2021-23992 Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user
1948395 - CVE-2021-23993 Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key
6. Package List:
Red Hat Enterprise Linux Client (v. 7):
Source:
thunderbird-78.9.1-1.el7_9.src.rpm
x86_64:
thunderbird-78.9.1-1.el7_9.x86_64.rpm
thunderbird-debuginfo-78.9.1-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 7):
Source:
thunderbird-78.9.1-1.el7_9.src.rpm
ppc64le:
thunderbird-78.9.1-1.el7_9.ppc64le.rpm
thunderbird-debuginfo-78.9.1-1.el7_9.ppc64le.rpm
x86_64:
thunderbird-78.9.1-1.el7_9.x86_64.rpm
thunderbird-debuginfo-78.9.1-1.el7_9.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
thunderbird-78.9.1-1.el7_9.src.rpm
x86_64:
thunderbird-78.9.1-1.el7_9.x86_64.rpm
thunderbird-debuginfo-78.9.1-1.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/
7. References:
https://access.redhat.com/security/cve/CVE-2021-23991
https://access.redhat.com/security/cve/CVE-2021-23992
https://access.redhat.com/security/cve/CVE-2021-23993
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <[email protected]>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2021 Red Hat, Inc.
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