[gentoo-announce] [ GLSA 200812-16 ] Dovecot: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200812-16

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http://security.gentoo.org/

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Severity: Normal

Title: Dovecot: Multiple vulnerabilities

Date: December 14, 2008

Bugs: #240409, #244962, #245316

ID: 200812-16

 

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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

-------------------------------------------------------------------

1 net-mail/dovecot < 1.1.7-r1 >= 1.1.7-r1

 

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

==========

 

[ 1 ] CVE-2008-4577

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4577

[ 2 ] CVE-2008-4578

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4578

[ 3 ] CVE-2008-4870

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4870

[ 4 ] CVE-2008-4907

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4907

 

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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2008 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5