Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2013.1627 Important: kernel security and bug fix update 14 November 2013 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2013-4299 CVE-2012-4508 Reference: ESB-2013.1558 ESB-2013.1540 ESB-2013.1498 ESB-2013.1497 ESB-2013.1469 ESB-2013.0691 ESB-2013.0306 ESB-2013.0243 ESB-2012.1144 ESB-2012.1139 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2013-1519.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2013:1519-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1519.html Issue date: 2013-11-13 CVE Names: CVE-2012-4508 CVE-2013-4299 ===================================================================== 1. Summary: Updated kernel packages that fix two security issues and several bugs are now available for Red Hat Enterprise Linux 6.2 Extended Update Support. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Compute Node EUS (v. 6.2) - noarch, x86_64 Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.2) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.2) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.2) - i386, ppc64, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. * A race condition was found in the way asynchronous I/O and fallocate() interacted when using the ext4 file system. A local, unprivileged user could use this flaw to expose random data from an extent whose data blocks have not yet been written, and thus contain data from a deleted file. (CVE-2012-4508, Important) * An information leak flaw was found in the way Linux kernel's device mapper subsystem, under certain conditions, interpreted data written to snapshot block devices. An attacker could use this flaw to read data from disk blocks in free space, which are normally inaccessible. (CVE-2013-4299, Moderate) Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508, and Fujitsu for reporting CVE-2013-4299. Upstream acknowledges Dmitry Monakhov as the original reporter of CVE-2012-4508. This update also fixes the following bugs: * When the Audit subsystem was under heavy load, it could loop infinitely in the audit_log_start() function instead of failing over to the error recovery code. This would cause soft lockups in the kernel. With this update, the timeout condition in the audit_log_start() function has been modified to properly fail over when necessary. (BZ#1017898) * When handling Memory Type Range Registers (MTRRs), the stop_one_cpu_nowait() function could potentially be executed in parallel with the stop_machine() function, which resulted in a deadlock. The MTRR handling logic now uses the stop_machine() function and makes use of mutual exclusion to avoid the aforementioned deadlock. (BZ#1017902) * Power-limit notification interrupts were enabled by default. This could lead to degradation of system performance or even render the system unusable on certain platforms, such as Dell PowerEdge servers. Power-limit notification interrupts have been disabled by default and a new kernel command line parameter "int_pln_enable" has been added to allow users to observe these events using the existing system counters. Power-limit notification messages are also no longer displayed on the console. The affected platforms no longer suffer from degraded system performance due to this problem. (BZ#1020519) * Package level thermal and power limit events are not defined as MCE errors for the x86 architecture. However, the mcelog utility erroneously reported these events as MCE errors with the following message: kernel: [Hardware Error]: Machine check events logged Package level thermal and power limit events are no longer reported as MCE errors by mcelog. When these events are triggered, they are now reported only in the respective counters in sysfs (specifically, /sys/devices/system/cpu/cpu<number>/thermal_throttle/). (BZ#1021950) * An insufficiently designed calculation in the CPU accelerator could cause an arithmetic overflow in the set_cyc2ns_scale() function if the system uptime exceeded 208 days prior to using kexec to boot into a new kernel. This overflow led to a kernel panic on systems using the Time Stamp Counter (TSC) clock source, primarily systems using Intel Xeon E5 processors that do not reset TSC on soft power cycles. A patch has been applied to modify the calculation so that this arithmetic overflow and kernel panic can no longer occur under these circumstances. (BZ#1024453) All kernel users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. The system must be rebooted for this update to take effect. 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. 5. Bugs fixed (http://bugzilla.redhat.com/): 869904 - CVE-2012-4508 kernel: ext4: AIO vs fallocate stale data exposure 1004233 - CVE-2013-4299 kernel: dm: dm-snapshot data leak 6. Package List: Red Hat Enterprise Linux Compute Node EUS (v. 6.2): Source: kernel-2.6.32-220.45.1.el6.src.rpm noarch: kernel-doc-2.6.32-220.45.1.el6.noarch.rpm kernel-firmware-2.6.32-220.45.1.el6.noarch.rpm x86_64: kernel-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.45.1.el6.x86_64.rpm kernel-devel-2.6.32-220.45.1.el6.x86_64.rpm kernel-headers-2.6.32-220.45.1.el6.x86_64.rpm perf-2.6.32-220.45.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.2): Source: kernel-2.6.32-220.45.1.el6.src.rpm x86_64: kernel-debug-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.45.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm python-perf-2.6.32-220.45.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.2): Source: kernel-2.6.32-220.45.1.el6.src.rpm i386: kernel-2.6.32-220.45.1.el6.i686.rpm kernel-debug-2.6.32-220.45.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-220.45.1.el6.i686.rpm kernel-debug-devel-2.6.32-220.45.1.el6.i686.rpm kernel-debuginfo-2.6.32-220.45.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-220.45.1.el6.i686.rpm kernel-devel-2.6.32-220.45.1.el6.i686.rpm kernel-headers-2.6.32-220.45.1.el6.i686.rpm perf-2.6.32-220.45.1.el6.i686.rpm perf-debuginfo-2.6.32-220.45.1.el6.i686.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.i686.rpm noarch: kernel-doc-2.6.32-220.45.1.el6.noarch.rpm kernel-firmware-2.6.32-220.45.1.el6.noarch.rpm ppc64: kernel-2.6.32-220.45.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-220.45.1.el6.ppc64.rpm kernel-debug-2.6.32-220.45.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-220.45.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-220.45.1.el6.ppc64.rpm kernel-devel-2.6.32-220.45.1.el6.ppc64.rpm kernel-headers-2.6.32-220.45.1.el6.ppc64.rpm perf-2.6.32-220.45.1.el6.ppc64.rpm perf-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm s390x: kernel-2.6.32-220.45.1.el6.s390x.rpm kernel-debug-2.6.32-220.45.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-220.45.1.el6.s390x.rpm kernel-debug-devel-2.6.32-220.45.1.el6.s390x.rpm kernel-debuginfo-2.6.32-220.45.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-220.45.1.el6.s390x.rpm kernel-devel-2.6.32-220.45.1.el6.s390x.rpm kernel-headers-2.6.32-220.45.1.el6.s390x.rpm kernel-kdump-2.6.32-220.45.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-220.45.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-220.45.1.el6.s390x.rpm perf-2.6.32-220.45.1.el6.s390x.rpm perf-debuginfo-2.6.32-220.45.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.s390x.rpm x86_64: kernel-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.45.1.el6.x86_64.rpm kernel-devel-2.6.32-220.45.1.el6.x86_64.rpm kernel-headers-2.6.32-220.45.1.el6.x86_64.rpm perf-2.6.32-220.45.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.2): Source: kernel-2.6.32-220.45.1.el6.src.rpm i386: kernel-debug-debuginfo-2.6.32-220.45.1.el6.i686.rpm kernel-debuginfo-2.6.32-220.45.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-220.45.1.el6.i686.rpm perf-debuginfo-2.6.32-220.45.1.el6.i686.rpm python-perf-2.6.32-220.45.1.el6.i686.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-220.45.1.el6.ppc64.rpm perf-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm python-perf-2.6.32-220.45.1.el6.ppc64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-220.45.1.el6.s390x.rpm kernel-debuginfo-2.6.32-220.45.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-220.45.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-220.45.1.el6.s390x.rpm perf-debuginfo-2.6.32-220.45.1.el6.s390x.rpm python-perf-2.6.32-220.45.1.el6.s390x.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.45.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.45.1.el6.x86_64.rpm python-perf-2.6.32-220.45.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.45.1.el6.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-2012-4508.html https://www.redhat.com/security/data/cve/CVE-2013-4299.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 2013 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFSg8u/XlSAg2UNWIIRAu11AJ4w9FlzIAQyVEskmkkEiaxxoEQyGwCeIHTE 0iYz3l9OpRfVQj1Ranal8kI= =Su10 - -----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 iQIVAwUBUoQxdBLndAQH1ShLAQLaPhAAt/6l/G1VH5Jjpqh3A2O9KuFquhLyUBCs QhTUwYHjNXTxzE08U0xJpnPTUxKz/DzUqYrjbepb/L52Z7nMbeNb8Befr9IN/boU 3n96xa6SbmyJn9kBofojIGQ03rUkEjMIf9VS6g+qd89tWN0ehdQzVPEK5pFy6OU/ SGLBzYqHiTmsc809QqBvEp+diX3GQVsTKyT8jhIx8rQDdpdqoVQAoLGvzdQpSV07 goDTkV+uXg+TbuP1Qnly2XXmp+q0h3pLZOLvGN4/wrhTHFnRCZUW2rFIrE3u5Gvw YAQ3h6iUtvEZrhknr2Ny+kXPQYNdT0N2D5Iyyson5UBWP/fqwY0zXw1dvYeR6IFo Y4k3icGpVmSN+RQV1mu7otCpWfBwdbNkdzCYaujHYVYaP0oX6lV1yWMjyx5grWwr /3rlNfwiLa2eXyN2bDfnVjcgoa9R+mzhNiCfubHxRvW2Q0a0zt/Gzllpm3+9nH0i 1IlWOz+YA1D7EkGSl1t6DYTOBW+Aq88G7N1cY4WOA9gCdvWpFohj4Zn2z7hN5nHf 8WtYMuAufcdNnlS2vUN/eMgY0yY8C8m9xjaq6xqZbJAIElG7zj+m6oiiXMbu1pzX FyS4AatrDqVZsAVt2/Da4yLQIPjtLVAAXPmrK118fDGvnFztvKoxGaYBLvsu1LG6 oBYuYTTtZZs= =GZgu -----END PGP SIGNATURE-----