The DBD::mysql module through 4.043 for Perl uses the mysql_ssl=1 setting to mean that SSL is optional (even though this setting's documentation has a "your communication with the server will be encrypted" statement), which allows man-in-the-middle attackers to spoof servers via a cleartext-downgrade attack, a related issue to CVE-2015-3152.
{ "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro", "ubuntu_priority": "low", "binaries": [ { "binary_version": "4.033-1ubuntu0.1+esm1", "binary_name": "libdbd-mysql-perl" }, { "binary_version": "4.033-1ubuntu0.1+esm1", "binary_name": "libdbd-mysql-perl-dbgsym" } ] }