Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.0260 Low: dovecot security and bug fix update 22 February 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dovecot Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Red Hat Enterprise Linux WS/Desktop 6 UNIX variants (UNIX, Linux, OSX) Impact/Access: Provide Misleading Information -- Remote with User Interaction Unauthorised Access -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2011-4318 CVE-2011-2167 CVE-2011-2166 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2013-0520.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running dovecot check for an updated version of the software for their operating system. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: dovecot security and bug fix update Advisory ID: RHSA-2013:0520-02 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0520.html Issue date: 2013-02-21 CVE Names: CVE-2011-2166 CVE-2011-2167 CVE-2011-4318 ===================================================================== 1. Summary: Updated dovecot packages that fix three security issues and one bug are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having low 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, written with security primarily in mind, for Linux and other UNIX-like systems. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are provided as sub-packages. Two flaws were found in the way some settings were enforced by the script-login functionality of Dovecot. A remote, authenticated user could use these flaws to bypass intended access restrictions or conduct a directory traversal attack by leveraging login scripts. (CVE-2011-2166, CVE-2011-2167) A flaw was found in the way Dovecot performed remote server identity verification, when it was configured to proxy IMAP and POP3 connections to remote hosts using TLS/SSL protocols. A remote attacker could use this flaw to conduct man-in-the-middle attacks using an X.509 certificate issued by a trusted Certificate Authority (for a different name). (CVE-2011-4318) This update also fixes the following bug: * When a new user first accessed their IMAP inbox, Dovecot was, under some circumstances, unable to change the group ownership of the inbox directory in the user's Maildir location to match that of the user's mail spool (/var/mail/$USER). This correctly generated an "Internal error occurred" message. However, with a subsequent attempt to access the inbox, Dovecot saw that the directory already existed and proceeded with its operation, leaving the directory with incorrectly set permissions. This update corrects the underlying permissions setting error. When a new user now accesses their inbox for the first time, and it is not possible to set group ownership, Dovecot removes the created directory and generates an error message instead of keeping the directory with incorrect group ownership. (BZ#697620) Users of dovecot are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 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/knowledge/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 709095 - CVE-2011-2166 dovecot: authenticated remote bypass of intended access restrictions 709097 - CVE-2011-2167 dovecot: directory traversal due to not obeying chroot directive 754980 - CVE-2011-4318 dovecot: proxy destination host name not checked against SSL certificate name 6. Package List: Red Hat Enterprise Linux Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dovecot-2.0.9-5.el6.src.rpm i386: dovecot-2.0.9-5.el6.i686.rpm dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-mysql-2.0.9-5.el6.i686.rpm dovecot-pgsql-2.0.9-5.el6.i686.rpm dovecot-pigeonhole-2.0.9-5.el6.i686.rpm ppc64: dovecot-2.0.9-5.el6.ppc.rpm dovecot-2.0.9-5.el6.ppc64.rpm dovecot-debuginfo-2.0.9-5.el6.ppc.rpm dovecot-debuginfo-2.0.9-5.el6.ppc64.rpm dovecot-mysql-2.0.9-5.el6.ppc64.rpm dovecot-pgsql-2.0.9-5.el6.ppc64.rpm dovecot-pigeonhole-2.0.9-5.el6.ppc64.rpm s390x: dovecot-2.0.9-5.el6.s390.rpm dovecot-2.0.9-5.el6.s390x.rpm dovecot-debuginfo-2.0.9-5.el6.s390.rpm dovecot-debuginfo-2.0.9-5.el6.s390x.rpm dovecot-mysql-2.0.9-5.el6.s390x.rpm dovecot-pgsql-2.0.9-5.el6.s390x.rpm dovecot-pigeonhole-2.0.9-5.el6.s390x.rpm x86_64: dovecot-2.0.9-5.el6.i686.rpm dovecot-2.0.9-5.el6.x86_64.rpm dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-debuginfo-2.0.9-5.el6.x86_64.rpm dovecot-mysql-2.0.9-5.el6.x86_64.rpm dovecot-pgsql-2.0.9-5.el6.x86_64.rpm dovecot-pigeonhole-2.0.9-5.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dovecot-2.0.9-5.el6.src.rpm i386: dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-devel-2.0.9-5.el6.i686.rpm ppc64: dovecot-debuginfo-2.0.9-5.el6.ppc64.rpm dovecot-devel-2.0.9-5.el6.ppc64.rpm s390x: dovecot-debuginfo-2.0.9-5.el6.s390x.rpm dovecot-devel-2.0.9-5.el6.s390x.rpm x86_64: dovecot-debuginfo-2.0.9-5.el6.x86_64.rpm dovecot-devel-2.0.9-5.el6.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dovecot-2.0.9-5.el6.src.rpm i386: dovecot-2.0.9-5.el6.i686.rpm dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-mysql-2.0.9-5.el6.i686.rpm dovecot-pgsql-2.0.9-5.el6.i686.rpm dovecot-pigeonhole-2.0.9-5.el6.i686.rpm x86_64: dovecot-2.0.9-5.el6.i686.rpm dovecot-2.0.9-5.el6.x86_64.rpm dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-debuginfo-2.0.9-5.el6.x86_64.rpm dovecot-mysql-2.0.9-5.el6.x86_64.rpm dovecot-pgsql-2.0.9-5.el6.x86_64.rpm dovecot-pigeonhole-2.0.9-5.el6.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dovecot-2.0.9-5.el6.src.rpm i386: dovecot-debuginfo-2.0.9-5.el6.i686.rpm dovecot-devel-2.0.9-5.el6.i686.rpm x86_64: dovecot-debuginfo-2.0.9-5.el6.x86_64.rpm dovecot-devel-2.0.9-5.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-2011-2166.html https://www.redhat.com/security/data/cve/CVE-2011-2167.html https://www.redhat.com/security/data/cve/CVE-2011-4318.html https://access.redhat.com/security/updates/classification/#low 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2013 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFRJcMBXlSAg2UNWIIRAsLkAKCVzudrg6y2jNbVu8TARQH65FPliACgpPzA 3cvEfHEUoK/fdUBZNDEuZqU= =9rAE - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUScDt+4yVqjM2NGpAQJyZBAAqKD8f4GiPBTKpU+Ow+hSgrNpjo/CnPR/ iRBVJS5SJ1SFNAprT8saNhXgUUk9SdT8JLmvV6LpqJ040lL1BXpNweqhjs79Narh Lkj/BzrozSZFpD9Q4rOisSCZC5E1DH6j+YMKJJyp9OiOVlWrflyEPiAFGaLT55Sn uxQkFQNbNY/yPiLlR5f8yglfIvRHMbwh5xbjMHj5W5EV1gKbUnTg1tClMXZ0gh+G 0HhcY+rSZXFiaYN/hqeswqtkvSUnhUkDnQcQYtHa3zx03LIvFliZSGULUyV838dc mtty42UzObSKbPt0+2KppOp2e/y5J1neE0P1VTjrPV0o6fOdmvh2kyM/7Van1k6W aQGJC5m7fnJsyNGkN33198lb46eKM75+u2mX5vwhIMlJt5NgWRPC7/jjXlM3iaNN IyFbWpsO663ociqT/LWaOG9kN3NXIKjMTAdYBqvAsKfXcqXm6dlDn8FVpt6PDEIc t6yG46AeJIyWpVKGyZlHocKMKPnvuZXCVYC7SZwL0zlPFoqX7Vd3ICQ1CRToVeJs 1HDnsUJ/3B4qm6Dn1m7oLhnwnInKcBIF7zZy6xnyGW22owqYjvaQ31JmOfTfNI5q 1VjQz+gzfuL4h8PT51F5qqpff6mg1d63XLLbCh+zEFBE7bC9bv7DjqoHAC3JDvPC ezHIWQKdeno= =HMn7 -----END PGP SIGNATURE-----