CVE-2020-12674

A flaw was found in dovecot. An attacker can use the way dovecot handles RPA (Remote Passphrase Authentication) to crash the authentication process repeatedly preventing login. The highest threat from this vulnerability is to system availability.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Upstream suggests that this flaw can be mitigated by disabling RPA (Remote Passphrase Authentication). RPA can be disabled by using the configuration parameter "auth_mechanisms". More details available at: https://doc.dovecot.org/configuration_manual/authentication/authentication_mechanisms/