GLSA 200812-16: Dovecot: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Dovecot: Multiple vulnerabilities
Date:	12/14/2008
Bugs:	#240409, #244962, #245316
ID:	200812-16

Synopsis

Multiple vulnerabilities were found in the Dovecot mailserver.

Background

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

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-mail/dovecot	< 1.1.7-r1	>= 1.1.7-r1	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200812-16.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.