Dovecot: Multiple vulnerabilities — GLSA 200812-16

Multiple vulnerabilities were found in the Dovecot mailserver.

Affected packages

Package	net-mail/dovecot on all architectures
Affected versions	< 1.1.7-r1
Unaffected versions	>= 1.1.7-r1

Background

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

Description

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)

Impact

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.

Workaround

There is no known workaround at this time.

Resolution

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".

References

Release date
December 14, 2008

Latest revision
December 14, 2008: 01

Severity
normal

Exploitable
remote

Bugzilla entries