RHEL 6 : dovecot (RHSA-2011:0600)

This script is Copyright (C) 2011-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

Updated dovecot packages that fix two security issues and add one
enhancement are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having
moderate security impact. Common Vulnerability Scoring System (CVSS)
base scores, which give detailed severity ratings, are available for
each vulnerability from the CVE links in the References section.

Dovecot is an IMAP server for Linux, UNIX, and similar operating
systems, primarily written with security in mind.

A flaw was found in the way Dovecot handled SIGCHLD signals. If a
large amount of IMAP or POP3 session disconnects caused the Dovecot
master process to receive these signals rapidly, it could cause the
master process to crash. (CVE-2010-3780)

A flaw was found in the way Dovecot processed multiple Access Control
Lists (ACL) defined for a mailbox. In some cases, Dovecot could fail
to apply the more specific ACL entry, possibly resulting in more
access being granted to the user than intended. (CVE-2010-3707)

This update also adds the following enhancement :

* This erratum upgrades Dovecot to upstream version 2.0.9, providing
multiple fixes for the 'dsync' utility and improving overall
performance. Refer to the '/usr/share/doc/dovecot-2.0.9/ChangeLog'
file after installing this update for further information about the
changes. (BZ#637056)

Users of dovecot are advised to upgrade to these updated packages,
which resolve these issues and add this enhancement. After installing
the updated packages, the dovecot service will be restarted
automatically.

See also :

https://www.redhat.com/security/data/cve/CVE-2010-3707.html
https://www.redhat.com/security/data/cve/CVE-2010-3780.html
http://rhn.redhat.com/errata/RHSA-2011-0600.html

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 5.5
(CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N)
CVSS Temporal Score : 4.1
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 54597 ()

Bugtraq ID: 43690

CVE ID: CVE-2010-3707
CVE-2010-3780