Scientific Linux Security Update : dovecot on SL5.x i386/x86_64

This script is Copyright (C) 2012 Tenable Network Security, Inc.


Synopsis :

The remote Scientific Linux host is missing a security update.

Description :

A flaw was found in Dovecot's ACL plug-in. The ACL plug-in treated
negative access rights as positive rights, which could allow an
attacker to bypass intended access restrictions. (CVE-2008-4577)

A password disclosure flaw was found with Dovecot's configuration
file. If a system had the 'ssl_key_password' option defined, any local
user could view the SSL key password. (CVE-2008-4870)

Note: This flaw did not allow the attacker to acquire the contents of
the SSL key. The password has no value without the key file which
arbitrary users should not have read access to.

To better protect even this value, however, the dovecot.conf file now
supports the '!include_try' directive. The ssl_key_password option
should be moved from dovecot.conf to a new file owned by, and only
readable and writable by, root (ie 0600). This file should be
referenced from dovecot.conf by setting the '!include_try
[/path/to/password/file]' option.

Additionally, this update addresses the following bugs :

- the dovecot init script -- /etc/rc.d/init.d/dovecot --
did not check if the dovecot binary or configuration
files existed. It also used the wrong pid file for
checking the dovecot service's status. This update
includes a new init script that corrects these errors.

- the %files section of the dovecot spec file did not
include '%dir %{ssldir}/private'. As a consequence, the
/etc/pki/private/ directory was not owned by dovecot.
(Note: files inside /etc/pki/private/ were and are owned
by dovecot.) With this update, the missing line has been
added to the spec file, and the noted directory is now
owned by dovecot.

- in some previously released versions of dovecot, the
authentication process accepted (and passed along
un-escaped) passwords containing characters that had
special meaning to dovecot's internal protocols. This
updated release prevents such passwords from being
passed back, instead returning the error, 'Attempted
login with password having illegal chars'.

Note: dovecot versions previously shipped with Scientific Linux 5 did
not allow this behavior. This update addresses the issue above but
said issue was only present in versions of dovecot not previously
included with Scientific Linux 5.

See also :

http://www.nessus.org/u?1828eb61

Solution :

Update the affected dovecot package.

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N)

Family: Scientific Linux Local Security Checks

Nessus Plugin ID: 60524 ()

Bugtraq ID:

CVE ID: CVE-2008-4577
CVE-2008-4870