Issued:

2011-05-19

Updated:

2011-05-19

RHSA-2011:0600 - Moderate: dovecot security and enhancement update

Synopsis

Moderate: dovecot security and enhancement update

Type/Severity

Security Advisory Moderate

Topic

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.

Description

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.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• dovecot-2.0.9-2.el6.ppc64.rpm
• dovecot-mysql-2.0.9-2.el6.i686.rpm
• dovecot-pgsql-2.0.9-2.el6.ppc64.rpm
• dovecot-mysql-2.0.9-2.el6.s390x.rpm
• dovecot-debuginfo-2.0.9-2.el6.s390.rpm
• dovecot-debuginfo-2.0.9-2.el6.x86_64.rpm
• dovecot-2.0.9-2.el6.s390x.rpm
• dovecot-debuginfo-2.0.9-2.el6.s390x.rpm
• dovecot-devel-2.0.9-2.el6.x86_64.rpm
• dovecot-2.0.9-2.el6.ppc.rpm
• dovecot-devel-2.0.9-2.el6.ppc64.rpm
• dovecot-mysql-2.0.9-2.el6.ppc64.rpm
• dovecot-pigeonhole-2.0.9-2.el6.x86_64.rpm
• dovecot-debuginfo-2.0.9-2.el6.i686.rpm
• dovecot-2.0.9-2.el6.i686.rpm
• dovecot-pgsql-2.0.9-2.el6.s390x.rpm
• dovecot-mysql-2.0.9-2.el6.x86_64.rpm
• dovecot-devel-2.0.9-2.el6.i686.rpm
• dovecot-2.0.9-2.el6.s390.rpm
• dovecot-devel-2.0.9-2.el6.s390x.rpm
• dovecot-debuginfo-2.0.9-2.el6.ppc.rpm
• dovecot-debuginfo-2.0.9-2.el6.ppc64.rpm
• dovecot-pigeonhole-2.0.9-2.el6.s390x.rpm
• dovecot-pigeonhole-2.0.9-2.el6.ppc64.rpm
• dovecot-pigeonhole-2.0.9-2.el6.i686.rpm
• dovecot-2.0.9-2.el6.src.rpm
• dovecot-2.0.9-2.el6.x86_64.rpm
• dovecot-pgsql-2.0.9-2.el6.x86_64.rpm
• dovecot-pgsql-2.0.9-2.el6.i686.rpm

Fixes

• This content is not included.BZ - 637056
• This content is not included.BZ - 640410
• This content is not included.BZ - 641276

CVEs

• CVE-2010-3780
• CVE-2010-3707

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.