Issued:

2011-08-18

Updated:

2011-08-18

RHSA-2011:1187 - Moderate: dovecot security update

Synopsis

Moderate: dovecot security update

Type/Severity

Security Advisory Moderate

Topic

Updated dovecot packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6.

The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

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

A denial of service flaw was found in the way Dovecot handled NULL characters in certain header names. A mail message with specially-crafted headers could cause the Dovecot child process handling the target user's connection to crash, blocking them from downloading the message successfully and possibly leading to the corruption of their mailbox. (CVE-2011-1929)

Users of dovecot are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. 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-1.0.7-7.el5_7.1.x86_64.rpm
• dovecot-devel-2.0.9-2.el6_1.1.x86_64.rpm
• dovecot-pgsql-2.0.9-2.el6_1.1.x86_64.rpm
• dovecot-pigeonhole-2.0.9-2.el6_1.1.x86_64.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.ppc.rpm
• dovecot-2.0.9-2.el6_1.1.ppc.rpm
• dovecot-pgsql-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-0.99.11-10.EL4.s390.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.i686.rpm
• dovecot-0.99.11-10.EL4.s390x.rpm
• dovecot-2.0.9-2.el6_1.1.x86_64.rpm
• dovecot-1.0.7-7.el5_7.1.i386.rpm
• dovecot-mysql-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.s390.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.x86_64.rpm
• dovecot-mysql-2.0.9-2.el6_1.1.i686.rpm
• dovecot-pgsql-2.0.9-2.el6_1.1.i686.rpm
• dovecot-devel-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-1.0.7-7.el5_7.1.src.rpm
• dovecot-0.99.11-10.EL4.src.rpm
• dovecot-pgsql-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-0.99.11-10.EL4.ia64.rpm
• dovecot-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-devel-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-1.0.7-7.el5_7.1.ia64.rpm
• dovecot-mysql-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-0.99.11-10.EL4.x86_64.rpm
• dovecot-0.99.11-10.EL4.ppc.rpm
• dovecot-0.99.11-10.EL4.i386.rpm
• dovecot-1.0.7-7.el5_7.1.ppc.rpm
• dovecot-debuginfo-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-2.0.9-2.el6_1.1.src.rpm
• dovecot-2.0.9-2.el6_1.1.i686.rpm
• dovecot-2.0.9-2.el6_1.1.s390.rpm
• dovecot-pigeonhole-2.0.9-2.el6_1.1.ppc64.rpm
• dovecot-pigeonhole-2.0.9-2.el6_1.1.s390x.rpm
• dovecot-pigeonhole-2.0.9-2.el6_1.1.i686.rpm
• dovecot-1.0.7-7.el5_7.1.s390x.rpm
• dovecot-devel-2.0.9-2.el6_1.1.i686.rpm
• dovecot-mysql-2.0.9-2.el6_1.1.x86_64.rpm

Fixes

• This content is not included.BZ - 706286

CVEs

• CVE-2011-1929

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.