[RHSA-2021:0657] thunderbird security update

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.