It was discovered that Dovecot, a POP3 and IMAP server, only when used # Remark: "base" refers to a variable(?!) and should not contain something as # base = \\\\\\\%r! with LDAP authentication and base contains variables, could allow a user to log in to the account of another user with the same password. The old stable distribution (sarge) is not affected. For the stable distribution (etch), this problem has been fixed in version 1.0.rc15-2etch3. For the unstable distribution (sid), this problem has been fixed in version 1.0.10-1. We recommend that you upgrade your dovecot packages.