Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0996 Important: openstack-swift security update 17 October 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: openstack-swift Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Linux variants Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2012-4406 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2012-1379.html Comment: This advisory references vulnerabilities in products which run on platforms other than Red Hat. It is recommended that administrators running openstack-swift 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: openstack-swift security update Advisory ID: RHSA-2012:1379-01 Product: Red Hat OpenStack Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1379.html Issue date: 2012-10-16 CVE Names: CVE-2012-4406 ===================================================================== 1. Summary: Updated openstack-swift packages that fix one security issue are now available for Red Hat OpenStack Essex. The Red Hat Security Response Team 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: RHOS Essex Release - noarch 3. Description: OpenStack Swift (http://swift.openstack.org) is a highly available, distributed, eventually consistent object/blob store. It was found that OpenStack Swift used the Python pickle module in an insecure way to serialize and deserialize data from memcached. As memcached does not have authentication, an attacker on the local network, or possibly an unprivileged user in a virtual machine hosted on OpenStack, could use this flaw to inject specially-crafted data that would lead to arbitrary code execution. (CVE-2012-4406) Red Hat would like to thank Sebastian Krahmer of the SUSE Security Team for reporting this issue. Note: The fix for CVE-2012-4406 is not enabled by default, and requires manual action on the affected Proxy nodes. This update adds a "memcache_serialization_support" option. It is configured in "/etc/swift/proxy-server.conf" and is set to "0" by default. This default setting is vulnerable to CVE-2012-4406. To enable the fix, this option must be changed; however, the required changes can have a temporary, large performance impact. The following instructions aim to minimize performance issues: 1) Install the updated openstack-swift packages. 2) In "/etc/swift/proxy-server.conf", set the "memcache_serialization_support" option in the memcache/[filter:cache] section to "1". (The default value, "0", leaves you vulnerable to CVE-2012-4406.) When set to "1", the JSON (JavaScript Object Notation) format is used but pickle is still supported. This configuration is still vulnerable, but new data will be stored in JSON format. 3) After setting the option to "1", run "service openstack-swift-proxy restart". 4) After 24 hours, set the "memcache_serialization_support" option in "/etc/swift/proxy-server.conf" to "2". "2" is the secure option: only JSON is used. 5) After setting the option to "2", run "service openstack-swift-proxy restart". If "memcache_serialization_support" is set directly from "0" to "2", all data in memcached will be flushed and re-created. This can lead to a temporary, large performance impact. All users of openstack-swift are advised to upgrade to these updated packages, which correct this issue. 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/): 854757 - CVE-2012-4406 Openstack-Swift: insecure use of python pickle() 6. Package List: RHOS Essex Release: Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHOS/SRPMS/openstack-swift-1.4.8-5.el6.src.rpm noarch: openstack-swift-1.4.8-5.el6.noarch.rpm openstack-swift-account-1.4.8-5.el6.noarch.rpm openstack-swift-container-1.4.8-5.el6.noarch.rpm openstack-swift-doc-1.4.8-5.el6.noarch.rpm openstack-swift-object-1.4.8-5.el6.noarch.rpm openstack-swift-proxy-1.4.8-5.el6.noarch.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-2012-4406.html 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 2012 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFQfaBXXlSAg2UNWIIRAvLbAKColdZiv5oB0VKjkGi6qVuBcoC/9gCeKACf nS6/o9bHcfhFdiQvnwsIxdE= =420G - -----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 iQIVAwUBUH38g+4yVqjM2NGpAQK8rxAAgVjmlZQqWuBtNXnEf3ohoYNHDw4Vd2eM ez1ZGCFY/FXOwXyLeXnw00gfn/RSOOXcNr6X7gM16ITH6Z7v36zEN1XHrx2ZZFLL aPvmHfn3QoQGRJWmKJrmUX4rYEQIow460VcoUxNxVrXmHe2djA5zdNuQae7XX0p1 dV+BOAqPMFjLfMwrC+ZuGHdPMqtljhaJBfNlY5a5Jjl6cbfQ2JmiPtsquSlfutP0 a9EDKGXrIAdHCLk23GEhIrtBPnF7aOLaLJnhYwSRNhJpiIARXL2DP12BSMlOBERL DSTTbczYGCgt6uVZQLv+LFvTkWxJW4XdF1In+ev3odJUZtgfrk8CmvYCaBPTIL1T ewL11L2zX9u0Kv00odc3+ihj9en0KQ4NmH8fS+zPp5xE013Phvz6ciColFJ1+MVf 4assLc6gOYkq2DvSLQg7sGAfh4AI5VrlNgc9QTH1e8m21DRRgxzPXOR9EIce/6q7 bdRpBw2qO+OY2tpQ5Y+gdknAecpZ9IGWhfyix/jkYY9qbBNYP0RoCgQMaooNXu74 TpsVaElnvmxv/99tZ94mZbB6SUP3AQY0ETPrm2U5ti3Y5HsLHOAz6q23+dpupOun KfLJabVvwonsWlnBBboZGrV1GL63+b9EXmdPnCVKWHo8D7UusDyMzbyNNuDDtoNZ FbsMO7pVu6s= =V+/H -----END PGP SIGNATURE-----