RHSA-2021:2883 — Security Advisory

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 impact of Important. 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 78.12.0.

Security Fix(es):

• Mozilla: IMAP server responses sent by a MITM prior to STARTTLS could be processed (CVE-2021-29969)

• Mozilla: Use-after-free in accessibility features of a document (CVE-2021-29970)

• Mozilla: Memory safety bugs fixed in Firefox 90 and Firefox ESR 78.12 (CVE-2021-29976)

• chromium-browser: Out of bounds write in ANGLE (CVE-2021-30547)

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.