Related Vulnerabilities: CVE-2020-26970  

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable.

Severity High

Remote No

Type Arbitrary code execution

Description

When reading SMTP server status codes, Thunderbird writes an integer value to a position on the stack that is intended to contain just one byte. Depending on processor architecture and stack layout, this leads to stack corruption that may be exploitable.

AVG-1315 thunderbird 78.5.0-1 High Vulnerable

https://www.mozilla.org/en-US/security/advisories/mfsa2020-53/#CVE-2020-26970
https://bugzilla.mozilla.org/show_bug.cgi?id=1677338