Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 78.10.0.
Mozilla: Out of bound write due to lazy initialization (CVE-2021-23994)
Mozilla: Use-after-free in Responsive Design Mode (CVE-2021-23995)
Mozilla: More internal network hosts could have been probed by a malicious webpage (CVE-2021-23961)
Mozilla: Secure Lock icon could have been spoofed (CVE-2021-23998)
Mozilla: Blob URLs may have been granted additional privileges (CVE-2021-23999)
Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL (CVE-2021-24002)
Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads (CVE-2021-29945)
Mozilla: Port blocking could be bypassed (CVE-2021-29946)
Mozilla: Race condition when reading from disk while verifying signatures (CVE-2021-29948)
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.