description: If Thunderbird is configured to use STARTTLS for an IMAP server, and the server sends a PREAUTH response, then Thunderbird will continue with an unencrypted connection, causing email data to be sent without protection. This vulnerability affects Thunderbird < 68.9.0.
problem types: Security downgrade with IMAP STARTTLS leads to information leakage
affected:
{
product: Thunderbird
vendor: Mozilla
versions:
lessThan: 68.9.0, status: affected, version: unspecified, versionType: custom
}