CVE-2008-1218

Vulnerabilidad de inyección de argumentos en Dovecot 1.0.x anterior a 1.0.13, y 1.1.x anterior a 1.1.rc3, cuando se utiliza passdbs con bloqueo, permite a atacantes remotos evitar la comprobación de contraseña a través de una contraseña que contenga caracteres TAB, los cuales son tratados como delimitadores de los argumentos que permiten que el fichero skip_password_check sea especificado.

It was discovered that the default configuration of dovecot could allow access to any email files with group "mail" without verifying that a user had valid rights. An attacker able to create symlinks in their mail directory could exploit this to read or delete another user's email. By default, dovecot passed special characters to the underlying authentication systems. While Ubuntu releases of dovecot are not known to be vulnerable, the authentication routine was proactively improved to avoid potential future problems.