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===================================================================== Red Hat Security Advisory
Synopsis: Moderate: dovecot security and enhancement update Advisory ID: RHSA-2011:0600-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0600.html Issue date: 2011-05-19 CVE Names: CVE-2010-3707 CVE-2010-3780 =====================================================================
1. Summary:
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.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Server (v. 6) - i386, 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 Optional (v. 6) - i386, x86_64
3. 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.
4. 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/kb/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
637056 - rebase dovecot to 2.0 final 640410 - CVE-2010-3707 Dovecot: Failed to properly update ACL cache, when multiple rules defined rights for one subject 641276 - CVE-2010-3780 Dovecot: Busy master process, receiving a lot of SIGCHLD signals rapidly while logging, could die
6. Package List:
Red Hat Enterprise Linux Server (v. 6):
Source: dovecot-2.0.9-2.el6.src.rpm
i386: dovecot-2.0.9-2.el6.i686.rpm dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-mysql-2.0.9-2.el6.i686.rpm dovecot-pgsql-2.0.9-2.el6.i686.rpm dovecot-pigeonhole-2.0.9-2.el6.i686.rpm
ppc64: dovecot-2.0.9-2.el6.ppc.rpm dovecot-2.0.9-2.el6.ppc64.rpm dovecot-debuginfo-2.0.9-2.el6.ppc.rpm dovecot-debuginfo-2.0.9-2.el6.ppc64.rpm dovecot-mysql-2.0.9-2.el6.ppc64.rpm dovecot-pgsql-2.0.9-2.el6.ppc64.rpm dovecot-pigeonhole-2.0.9-2.el6.ppc64.rpm
s390x: dovecot-2.0.9-2.el6.s390.rpm dovecot-2.0.9-2.el6.s390x.rpm dovecot-debuginfo-2.0.9-2.el6.s390.rpm dovecot-debuginfo-2.0.9-2.el6.s390x.rpm dovecot-mysql-2.0.9-2.el6.s390x.rpm dovecot-pgsql-2.0.9-2.el6.s390x.rpm dovecot-pigeonhole-2.0.9-2.el6.s390x.rpm
x86_64: dovecot-2.0.9-2.el6.i686.rpm dovecot-2.0.9-2.el6.x86_64.rpm dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-debuginfo-2.0.9-2.el6.x86_64.rpm dovecot-mysql-2.0.9-2.el6.x86_64.rpm dovecot-pgsql-2.0.9-2.el6.x86_64.rpm dovecot-pigeonhole-2.0.9-2.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source: dovecot-2.0.9-2.el6.src.rpm
i386: dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-devel-2.0.9-2.el6.i686.rpm
ppc64: dovecot-debuginfo-2.0.9-2.el6.ppc64.rpm dovecot-devel-2.0.9-2.el6.ppc64.rpm
s390x: dovecot-debuginfo-2.0.9-2.el6.s390x.rpm dovecot-devel-2.0.9-2.el6.s390x.rpm
x86_64: dovecot-debuginfo-2.0.9-2.el6.x86_64.rpm dovecot-devel-2.0.9-2.el6.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source: dovecot-2.0.9-2.el6.src.rpm
i386: dovecot-2.0.9-2.el6.i686.rpm dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-mysql-2.0.9-2.el6.i686.rpm dovecot-pgsql-2.0.9-2.el6.i686.rpm dovecot-pigeonhole-2.0.9-2.el6.i686.rpm
x86_64: dovecot-2.0.9-2.el6.i686.rpm dovecot-2.0.9-2.el6.x86_64.rpm dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-debuginfo-2.0.9-2.el6.x86_64.rpm dovecot-mysql-2.0.9-2.el6.x86_64.rpm dovecot-pgsql-2.0.9-2.el6.x86_64.rpm dovecot-pigeonhole-2.0.9-2.el6.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source: dovecot-2.0.9-2.el6.src.rpm
i386: dovecot-debuginfo-2.0.9-2.el6.i686.rpm dovecot-devel-2.0.9-2.el6.i686.rpm
x86_64: dovecot-debuginfo-2.0.9-2.el6.x86_64.rpm dovecot-devel-2.0.9-2.el6.x86_64.rpm
These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2010-3707.html https://www.redhat.com/security/data/cve/CVE-2010-3780.html https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/
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