CVE-2019-14833

A flaw was found in Samba in the way it handles a user password change or a new password for a samba user. The Samba Active Directory Domain Controller can be configured to use a custom script to check for password complexity. This configuration can fail to verify password complexity when non-ASCII characters are used in the password, which could lead to weak passwords being set for samba users, making it vulnerable to dictionary attacks.

Mitigation

If the check password script parameter is not specified, Samba runs the internal password quality checks. The internal check makes sure that a password contains characters from three of five different characters categories.