RHSA-2021:0661 - Security Advisory

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 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.

Description

Mozilla Thunderbird is a standalone mail and newsgroup client.

This update upgrades Thunderbird to version 78.8.0.

Security Fix(es):

• Mozilla: Content Security Policy violation report could have contained the destination of a redirect (CVE-2021-23968)
• Mozilla: Content Security Policy violation report could have contained the destination of a redirect (CVE-2021-23969)
• Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8 (CVE-2021-23978)
• Mozilla: MediaError message property could have leaked information about cross-origin resources (CVE-2021-23973)

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.

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.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1932109 - CVE-2021-23969 Mozilla: Content Security Policy violation report could have contained the destination of a redirect
• BZ - 1932110 - CVE-2021-23968 Mozilla: Content Security Policy violation report could have contained the destination of a redirect
• BZ - 1932111 - CVE-2021-23973 Mozilla: MediaError message property could have leaked information about cross-origin resources
• BZ - 1932112 - CVE-2021-23978 Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8

CVEs

• CVE-2021-23968
• CVE-2021-23969
• CVE-2021-23973
• CVE-2021-23978

References

• https://access.redhat.com/security/updates/classification/#important