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Alerts This Week
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RHEL 8: RHSA-2021:1193-01 Moderate: Thunderbird OpenPGP Issues

red hat
Calendar Grey April 14, 2021
Dist Redhat Esm H88
The latest alert from Red Hat addresses a Moderate risk security patch for Thunderbird, targeting significant vulnerabilities and potential dangers to users.
An update for thunderbird 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

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 78.9.1.
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.

Topics%20covered

Topics Covered

security advisory moderate security update security fix Red Hat Enterprise Linux moderate impact Mozilla thunderbird mail client OpenPGP

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

Package List

Red Hat Enterprise Linux AppStream (v. 8):
Source: thunderbird-78.9.1-1.el8_3.src.rpm
aarch64: thunderbird-78.9.1-1.el8_3.aarch64.rpm thunderbird-debuginfo-78.9.1-1.el8_3.aarch64.rpm thunderbird-debugsource-78.9.1-1.el8_3.aarch64.rpm
ppc64le: thunderbird-78.9.1-1.el8_3.ppc64le.rpm thunderbird-debuginfo-78.9.1-1.el8_3.ppc64le.rpm thunderbird-debugsource-78.9.1-1.el8_3.ppc64le.rpm
x86_64: thunderbird-78.9.1-1.el8_3.x86_64.rpm thunderbird-debuginfo-78.9.1-1.el8_3.x86_64.rpm thunderbird-debugsource-78.9.1-1.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/


Advisory ID: RHSA-2021:1193-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2021:1193
Issue date: 2021-04-14

Topic

An update for thunderbird is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate security update security fix Red Hat Enterprise Linux moderate impact Mozilla thunderbird mail client OpenPGP

Relevant Releases Architectures

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

Bugs Fixed

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

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