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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.1358 Low: xinetd security and bug fix update 1 October 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: xinetd Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 5 Red Hat Enterprise Linux WS/Desktop 5 Impact/Access: Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-0862 Reference: ESB-2013.0244 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2013-1302.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Low: xinetd security and bug fix update Advisory ID: RHSA-2013:1302-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1302.html Issue date: 2013-09-30 Keywords: xinetd CVE Names: CVE-2012-0862 ===================================================================== 1. Summary: An updated xinetd package that fixes one security issue and two bugs is now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having low security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 3. Description: The xinetd package provides a secure replacement for inetd, the Internet services daemon. xinetd provides access control for all services based on the address of the remote host and/or on time of access, and can prevent denial-of-access attacks. When xinetd services are configured with the "TCPMUX" or "TCPMUXPLUS" type, and the tcpmux-server service is enabled, those services are accessible via port 1. It was found that enabling the tcpmux-server service (it is disabled by default) allowed every xinetd service, including those that are not configured with the "TCPMUX" or "TCPMUXPLUS" type, to be accessible via port 1. This could allow a remote attacker to bypass intended firewall restrictions. (CVE-2012-0862) Red Hat would like to thank Thomas Swan of FedEx for reporting this issue. This update also fixes the following bugs: * Prior to this update, a file descriptor array in the service.c source file was not handled as expected. As a consequence, some of the descriptors remained open when xinetd was under heavy load. Additionally, the system log was filled with a large number of messages that took up a lot of disk space over time. This update modifies the xinetd code to handle the file descriptors correctly and messages no longer fill the system log. (BZ#852274) * Prior to this update, services were disabled permanently when their CPS limit was reached. As a consequence, a failed bind operation could occur when xinetd attempted to restart the service. This update adds additional logic that attempts to restart the service. Now, the service is only disabled if xinetd cannot restart the service after 30 attempts. (BZ#811000) All users of xinetd are advised to upgrade to this updated package, which contains backported patches to correct these issues. 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/site/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 790940 - CVE-2012-0862 xinetd: enables unintentional services over tcpmux port 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xinetd-2.3.14-19.el5.src.rpm i386: xinetd-2.3.14-19.el5.i386.rpm xinetd-debuginfo-2.3.14-19.el5.i386.rpm x86_64: xinetd-2.3.14-19.el5.x86_64.rpm xinetd-debuginfo-2.3.14-19.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xinetd-2.3.14-19.el5.src.rpm i386: xinetd-2.3.14-19.el5.i386.rpm xinetd-debuginfo-2.3.14-19.el5.i386.rpm ia64: xinetd-2.3.14-19.el5.ia64.rpm xinetd-debuginfo-2.3.14-19.el5.ia64.rpm ppc: xinetd-2.3.14-19.el5.ppc.rpm xinetd-debuginfo-2.3.14-19.el5.ppc.rpm s390x: xinetd-2.3.14-19.el5.s390x.rpm xinetd-debuginfo-2.3.14-19.el5.s390x.rpm x86_64: xinetd-2.3.14-19.el5.x86_64.rpm xinetd-debuginfo-2.3.14-19.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://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2012-0862.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) iD8DBQFSSgpqXlSAg2UNWIIRAvpLAKCbKbjE5Ply5EtEBPXTPPxHFrIxRwCgrg3J ttoX9ugY0CfQfNkr1AiTFF0= =edRB - -----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 iQIVAwUBUko9GhLndAQH1ShLAQLVURAAr5Ey80W6zjxVuuUiC+ucSuWTiBtQgcYJ JReb6HENa8isMmxYBpB3qIBt7fu4GHudySIUomGorCHKs6JScCN3oPvGDdudKBQr BuM5AlUPiWNHWU7eh0raTJ1FmAMBn46+h7y93aLdwLWu8g/4K07RMV0AjI/dykGt QmKSnnUk6npGCQvrZ2GdvbjRIJa5t/zzwCU1C6SSRuf7JxB0NswfEeRtypAj9zUJ agC7MMJSe8vJzNGxo18krQgz8ec2pnouedp+8m2ish5rPSow92tJOSYucXCAW8j/ lJgwkK5Uls2G6HettGQLH8I1GKq25ONqyP1W1oPbA/6s0l6jMf99FkQxXEA+F0RO DBmE6QLbx+vJjVNEGqzLHGHxcImiQfK0ErW/dz/UTNOjBYr9qq8OddwghoSPlorN YxjXx19kmuzo/wIhhBc5JjOp4kpmzZV/de0+s/4aztYMIqREjfJjhUSEKrddPhMh a7NMEnguvMoUbZtmBUHTx6UGZSg+0pbV1R8AKPoqFdxxXjEFIj3H8Y3MgRIxR/Sw M/GaJRrDkJ3dSTI7X6HDR2Nxq4jKFOWOX1nOj1VgBRm2oOi40wWmTHsqzCqD3jpk ByXTXp2eUHght9pnOw8nX91smqqXkqmIcO8ljL28zWYhu/yF+SAFwpaTS9vgzkDh 0ntKX00/W34= =DC/q -----END PGP SIGNATURE-----