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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2009.0075 -- [UNIX/Linux][RedHat] Low: dovecot security and bug fix update 21 January 2009 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dovecot Publisher: Red Hat Operating System: Red Hat Linux Enterprise 5 UNIX variants (UNIX, Linux, OSX) Impact: Access Privileged Data Inappropriate Access Access: Existing Account CVE Names: CVE-2008-4870 CVE-2008-4577 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2009-0205.html Comment: This advisory references vulnerabilities in products which run on platforms other than RedHat. 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-2009:0205-02 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-0205.html Issue date: 2009-01-20 Keywords: initscript CVE Names: CVE-2008-4577 CVE-2008-4870 ===================================================================== 1. Summary: An updated dovecot package that corrects two security flaws and various bugs is now available for Red Hat Enterprise Linux 5. This update has been rated as having low security impact by the Red Hat Security Response Team. 2. Relevant releases/architectures: RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 3. Description: Dovecot is an IMAP server for Linux and UNIX-like systems, primarily written with security in mind. A flaw was found in Dovecot's ACL plug-in. The ACL plug-in treated negative access rights as positive rights, which could allow an attacker to bypass intended access restrictions. (CVE-2008-4577) A password disclosure flaw was found with Dovecot's configuration file. If a system had the "ssl_key_password" option defined, any local user could view the SSL key password. (CVE-2008-4870) Note: This flaw did not allow the attacker to acquire the contents of the SSL key. The password has no value without the key file which arbitrary users should not have read access to. To better protect even this value, however, the dovecot.conf file now supports the "!include_try" directive. The ssl_key_password option should be moved from dovecot.conf to a new file owned by, and only readable and writable by, root (ie 0600). This file should be referenced from dovecot.conf by setting the "!include_try [/path/to/password/file]" option. Additionally, this update addresses the following bugs: * the dovecot init script -- /etc/rc.d/init.d/dovecot -- did not check if the dovecot binary or configuration files existed. It also used the wrong pid file for checking the dovecot service's status. This update includes a new init script that corrects these errors. * the %files section of the dovecot spec file did not include "%dir %{ssldir}/private". As a consequence, the /etc/pki/private/ directory was not owned by dovecot. (Note: files inside /etc/pki/private/ were and are owned by dovecot.) With this update, the missing line has been added to the spec file, and the noted directory is now owned by dovecot. * in some previously released versions of dovecot, the authentication process accepted (and passed along un-escaped) passwords containing characters that had special meaning to dovecot's internal protocols. This updated release prevents such passwords from being passed back, instead returning the error, "Attempted login with password having illegal chars". Note: dovecot versions previously shipped with Red Hat Enterprise Linux 5 did not allow this behavior. This update addresses the issue above but said issue was only present in versions of dovecot not previously included with Red Hat Enterprise Linux 5. Users of dovecot are advised to upgrade to this updated package, which addresses these vulnerabilities and resolves these issues. 4. Solution: Before applying this update, make sure that all previously-released errata relevant to your system have been applied. This update is available via Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at http://kbase.redhat.com/faq/FAQ_58_10188 5. Bugs fixed (http://bugzilla.redhat.com/): 238016 - Wrong init script 436287 - dovecot.conf is world readable - possible password exposure 439369 - new dovecot security issues from the dovecot site 448089 - dovecot should own /etc/pki/dovecot/private directory 467436 - CVE-2008-4577 dovecot: incorrect handling of negative rights in the ACL plugin 469659 - CVE-2008-4870 dovecot: ssl_key_password disclosure due to an insecure dovecot.conf permissions 6. Package List: RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dovecot-1.0.7-7.el5.src.rpm i386: dovecot-1.0.7-7.el5.i386.rpm dovecot-debuginfo-1.0.7-7.el5.i386.rpm x86_64: dovecot-1.0.7-7.el5.x86_64.rpm dovecot-debuginfo-1.0.7-7.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/dovecot-1.0.7-7.el5.src.rpm i386: dovecot-1.0.7-7.el5.i386.rpm dovecot-debuginfo-1.0.7-7.el5.i386.rpm ia64: dovecot-1.0.7-7.el5.ia64.rpm dovecot-debuginfo-1.0.7-7.el5.ia64.rpm ppc: dovecot-1.0.7-7.el5.ppc.rpm dovecot-debuginfo-1.0.7-7.el5.ppc.rpm s390x: dovecot-1.0.7-7.el5.s390x.rpm dovecot-debuginfo-1.0.7-7.el5.s390x.rpm x86_64: dovecot-1.0.7-7.el5.x86_64.rpm dovecot-debuginfo-1.0.7-7.el5.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://www.redhat.com/security/team/key/#package 7. References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4577 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4870 http://www.redhat.com/security/updates/classification/#low 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://www.redhat.com/security/team/contact/ Copyright 2009 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFJdiZ+XlSAg2UNWIIRAiwvAKCBSrKaiISaD135RnLb7qreQQ37tgCfaAqu Rze6M2u8eTIxTkgOQLDH3EE= =632r - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBSXZe8Ch9+71yA2DNAQLMIQQAhwaKxfm9mHitFvjNJxnqyglRylrsyC7H qle+XIxjg7YSzhDBw8vT2QRbZEWXIfFmGw3ZAqDh7UQ61obvEoLgcl8TQMBVVtJ3 qK3fkSaJshh/d0OeDq4rROioRoJlPNNu4hZocgJM4FbCsYjmiEjbhoKAqAEuXOfA fEJmHiZvoUg= =yriH -----END PGP SIGNATURE-----