RHEL 6 : dovecot (RHSA-2011:0600)
Medium Nessus Plugin ID 54597
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionUpdated 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.
SolutionUpdate the affected packages.