RHSA-2021:1192: Red Hat Security Advisory: thunderbird security update

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.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. Related CVEs:
• CVE-2021-23991: Mozilla: An attacker may use Thunderbird’s OpenPGP key refresh mechanism to poison an existing key
• CVE-2021-23992: Mozilla: A crafted OpenPGP key with an invalid user ID could be used to confuse the user
• CVE-2021-23993: Mozilla: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key
• CVE-2021-29949: Mozilla: Thunderbird might execute an alternative OTR library
• CVE-2021-29950: Mozilla: Logic issue potentially leaves key material unlocked