Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2008.0544 -- [RedHat] Low: dovecot security and bug fix update 26 May 2008 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: dovecot Publisher: Red Hat Operating System: Red Hat Linux 5 Impact: Inappropriate Access Access: Remote/Unauthenticated Existing Account CVE Names: CVE-2008-1199 CVE-2007-6598 CVE-2007-4211 CVE-2007-2231 Ref: AA-2008.0066 ESB-2008.0028 ESB-2007.0653 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2008-0297.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: dovecot security and bug fix update Advisory ID: RHSA-2008:0297-02 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2008-0297.html Issue date: 2008-05-20 Updated on: 2008-05-21 CVE Names: CVE-2007-2231 CVE-2007-4211 CVE-2007-6598 CVE-2008-1199 ===================================================================== 1. Summary: An updated dovecot package that fixes several security issues 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 discovered in the way Dovecot handled the "mail_extra_groups" option. An authenticated attacker with local shell access could leverage this flaw to read, modify, or delete other users mail that is stored on the mail server. (CVE-2008-1199) This issue did not affect the default Red Hat Enterprise Linux 5 Dovecot configuration. This update adds two new configuration options -- "mail_privileged_group" and "mail_access_groups" -- to minimize the usage of additional privileges. A directory traversal flaw was discovered in Dovecot's zlib plug-in. An authenticated user could use this flaw to view other compressed mailboxes with the permissions of the Dovecot process. (CVE-2007-2231) A flaw was found in the Dovecot ACL plug-in. User with only insert permissions for a mailbox could use the "COPY" and "APPEND" commands to set additional message flags. (CVE-2007-4211) A flaw was found in a way Dovecot cached LDAP query results in certain configurations. This could possibly allow authenticated users to log in as a different user who has the same password. (CVE-2007-6598) As well, this updated package fixes the following bugs: * configuring "userdb" and "passdb" to use LDAP caused Dovecot to hang. A segmentation fault may have occurred. In this updated package, using an LDAP backend for "userdb" and "passdb" no longer causes Dovecot to hang. * the Dovecot "login_process_size" limit was configured for 32-bit systems. On 64-bit systems, when Dovecot was configured to use either IMAP or POP3, the log in processes crashed with out-of-memory errors. Errors such as the following were logged: pop3-login: pop3-login: error while loading shared libraries: libsepol.so.1: failed to map segment from shared object: Cannot allocate memory In this updated package, the "login_process_size" limit is correctly configured on 64-bit systems, which resolves this issue. Note: this updated package upgrades dovecot to version 1.0.7. For further details, refer to the Dovecot changelog: http://koji.fedoraproject.org/koji/buildinfo?buildID=23397 Users of dovecot are advised to upgrade to this updated package, which 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/): 238439 - CVE-2007-2231 Directory traversal in dovecot with zlib plugin 245249 - Dovecot hangs while using ldap backend. 251007 - CVE-2007-4211 Dovecot possible privilege ascalation in ACL plugin 253363 - Dovecot pop3-login/imap-login crash with OOM error 331441 - Please consider upgrading Dovecot to 1.0rc23 at least 380401 - tracker bug for 1.0.7 rebase 427575 - CVE-2007-6598: dovecot LDAP+auth cache user login mixup 436927 - CVE-2008-1199 dovecot: insecure mail_extra_groups option 6. Package List: RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/dovecot-1.0.7-2.el5.src.rpm i386: dovecot-1.0.7-2.el5.i386.rpm dovecot-debuginfo-1.0.7-2.el5.i386.rpm x86_64: dovecot-1.0.7-2.el5.x86_64.rpm dovecot-debuginfo-1.0.7-2.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-1.0.7-2.el5.src.rpm i386: dovecot-1.0.7-2.el5.i386.rpm dovecot-debuginfo-1.0.7-2.el5.i386.rpm ia64: dovecot-1.0.7-2.el5.ia64.rpm dovecot-debuginfo-1.0.7-2.el5.ia64.rpm ppc: dovecot-1.0.7-2.el5.ppc.rpm dovecot-debuginfo-1.0.7-2.el5.ppc.rpm s390x: dovecot-1.0.7-2.el5.s390x.rpm dovecot-debuginfo-1.0.7-2.el5.s390x.rpm x86_64: dovecot-1.0.7-2.el5.x86_64.rpm dovecot-debuginfo-1.0.7-2.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-2007-2231 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4211 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6598 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1199 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 2008 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFINDGqXlSAg2UNWIIRAsOeAJwKM3PYlb29LhOkcBx0olvLEhVqFgCeNBkT tjyub6/ivPbuDLqT6Y06D/Y= =peHK - -----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 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== 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 iQCVAwUBSDoVsyh9+71yA2DNAQJNygP8CSN/xmVaZs18O1EE68fbLnB5aVb6lPRT YHCbLIjR4s9uhMlFP8vb5NyvQbTAf2luVusP2ApCb1gPC/XpfkI/NJGX5h3WYHQN fgiF9lHx3wmb7ZVQXhvX51nBsP6KFTs5K+oJB7uog8odCoqA2OiNLYHgEOe3S9Ke 3eay+ltIqVg= =ZcId -----END PGP SIGNATURE-----