Dovecot: Multiple vulnerabilities

Dovecot: Multiple vulnerabilities Multiple vulnerabilities were found in the Dovecot mailserver. dovecot December 14, 2008 December 14, 2008: 01 240409 244962 245316 remote 1.1.7-r1 1.1.7-r1

Dovecot is an IMAP and POP3 server written with security primarily in mind.

Several vulnerabilities were found in Dovecot:

The "k" right in the acl_plugin does not work as expected (CVE-2008-4577, CVE-2008-4578)
The dovecot.conf is world-readable, providing improper protection for the ssl_key_password setting (CVE-2008-4870)
A permanent Denial of Service with broken mail headers is possible (CVE-2008-4907)

These vulnerabilities might allow a remote attacker to cause a Denial of Service, to circumvent security restrictions or allow local attackers to disclose the passphrase of the SSL private key.

There is no known workaround at this time.

All Dovecot users should upgrade to the latest version:


    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-mail/dovecot-1.1.7-r1"

Users should be aware that dovecot.conf will still be world-readable after the update. If employing ssl_key_password, it should not be used in dovecot.conf but in a separate file which should be included with "include_try".

CVE-2008-4577 CVE-2008-4578 CVE-2008-4870 CVE-2008-4907 craig p-y