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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.1291 Important: pcs security and bug fix update 13 May 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: pcs Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 UNIX variants (UNIX, Linux, OSX) Impact/Access: Provide Misleading Information -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-1848 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2015-0980.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running pcs 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: Important: pcs security and bug fix update Advisory ID: RHSA-2015:0980-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-0980.html Issue date: 2015-05-12 CVE Names: CVE-2015-1848 ===================================================================== 1. Summary: Updated pcs packages that fix one security issue and one bug are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important 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 Server High Availability (v. 7) - x86_64 Red Hat Enterprise Linux Server Resilient Storage (v. 7) - x86_64 3. Description: The pcs packages provide a command-line tool and a web UI to configure and manage the Pacemaker and Corosync tools. It was found that the pcs daemon did not sign cookies containing session data that were sent to clients connecting via the pcsd web UI. A remote attacker could use this flaw to forge cookies and bypass authorization checks, possibly gaining elevated privileges in the pcsd web UI. (CVE-2015-1848) This issue was discovered by Tomas Jelinek of Red Hat. This update also fixes the following bug: * Previously, the Corosync tool allowed the two_node option and the auto_tie_breaker option to exist in the corosync.conf file at the same time. As a consequence, if both options were included, auto_tie_breaker was silently ignored and the two_node fence race decided which node would survive in the event of a communication break. With this update, the pcs daemon has been fixed so that it does not produce corosync.conf files with both two_node and auto_tie_breaker included. In addition, if both two_node and auto_tie_breaker are detected in corosync.conf, Corosync issues a message at start-up and disables two_node mode. As a result, auto_tie_breaker effectively overrides two_node mode if both options are specified. (BZ#1205848) All pcs users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, the pcsd daemon will be restarted automatically. 4. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. For details on how to apply this update, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1208294 - CVE-2015-1848 pcs: improper web session variable signing 6. Package List: Red Hat Enterprise Linux Server High Availability (v. 7): Source: pcs-0.9.137-13.el7_1.2.src.rpm x86_64: pcs-0.9.137-13.el7_1.2.x86_64.rpm pcs-debuginfo-0.9.137-13.el7_1.2.x86_64.rpm python-clufter-0.9.137-13.el7_1.2.x86_64.rpm Red Hat Enterprise Linux Server Resilient Storage (v. 7): Source: pcs-0.9.137-13.el7_1.2.src.rpm x86_64: pcs-0.9.137-13.el7_1.2.x86_64.rpm pcs-debuginfo-0.9.137-13.el7_1.2.x86_64.rpm python-clufter-0.9.137-13.el7_1.2.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/ 7. References: https://access.redhat.com/security/cve/CVE-2015-1848 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2015 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFVUl+SXlSAg2UNWIIRAtfFAJ9EkSX9n1k4YqHPkSl1Ygu9PSHCeQCgjpta d4+bPXZP9qoXQwKgIM3UPu4= =/iGE - -----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. 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