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Red Hat 6/7: RHSA-2014:0790-01 Moderate: Dovecot DoS Issue

red hat
Calendar Grey June 25, 2014
Dist Redhat Esm H88
Revised Dovecot packages released for CentOS addressing a moderate vulnerability concerning denial-of-service exploits.
Updated dovecot packages that fix one security issue are now available for Red Hat Enterprise Linux 6 and 7

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 https://access.redhat.com/site/articles/11258

Summary

Dovecot is an IMAP server, written with security primarily in mind, for Linux and other UNIX-like systems. It also contains a small POP3 server. It supports mail in both the maildir or mbox format. The SQL drivers and authentication plug-ins are provided as subpackages.
It was discovered that Dovecot did not properly discard connections trapped in the SSL/TLS handshake phase. A remote attacker could use this flaw to cause a denial of service on an IMAP/POP3 server by exhausting the pool of available connections and preventing further, legitimate connections to the IMAP/POP3 server to be made. (CVE-2014-3430)
All dovecot users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the dovecot service will be restarted automatically.

Topics%20covered

Topics Covered

security advisory moderate denial of service security update red hat enterprise dovecot imaps

References

https://access.redhat.com/security/cve/CVE-2014-3430 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Server (v. 6):
Source: dovecot-2.0.9-7.el6_5.1.src.rpm
i386: dovecot-2.0.9-7.el6_5.1.i686.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.i686.rpm dovecot-mysql-2.0.9-7.el6_5.1.i686.rpm dovecot-pgsql-2.0.9-7.el6_5.1.i686.rpm dovecot-pigeonhole-2.0.9-7.el6_5.1.i686.rpm
ppc64: dovecot-2.0.9-7.el6_5.1.ppc.rpm dovecot-2.0.9-7.el6_5.1.ppc64.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.ppc.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.ppc64.rpm dovecot-mysql-2.0.9-7.el6_5.1.ppc64.rpm dovecot-pgsql-2.0.9-7.el6_5.1.ppc64.rpm dovecot-pigeonhole-2.0.9-7.el6_5.1.ppc64.rpm
s390x: dovecot-2.0.9-7.el6_5.1.s390.rpm dovecot-2.0.9-7.el6_5.1.s390x.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.s390.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.s390x.rpm dovecot-mysql-2.0.9-7.el6_5.1.s390x.rpm dovecot-pgsql-2.0.9-7.el6_5.1.s390x.rpm dovecot-pigeonhole-2.0.9-7.el6_5.1.s390x.rpm
x86_64: dovecot-2.0.9-7.el6_5.1.i686.rpm dovecot-2.0.9-7.el6_5.1.x86_64.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.i686.rpm dovecot-debuginfo-2.0.9-7.el6_5.1.x86_64.rpm dovecot-mysql-2.0.9-7.el6_5.1.x86_64.rpm dovecot-pgsql-2.0.9-7.el6_5.1.x86_64.rpm dovecot-pigeonhole-2.0.9-7.el6_5.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source: dovecot-2.0.9-7.el6_5.1.src.rpm
i386: dovecot-debuginfo-2.0.9-7.el6_5.1.i686.rpm

Read the Full Advisory


Advisory ID: RHSA-2014:0790-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2014:0790.html
Issue date: 2014-06-25

Topic

Updated dovecot packages that fix one security issue are now available forRed Hat Enterprise Linux 6 and 7.The Red Hat Security Response Team has rated this update as having Moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate denial of service security update red hat enterprise dovecot imaps

Relevant Releases Architectures

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

1096402 - CVE-2014-3430 dovecot: denial of service through maxxing out SSL connections

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