Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0247 Important: kernel-rt security and bug fix update 30 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Impact/Access: Root Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2018-18559 Reference: ESB-2019.0245 Original Bulletin: https://access.redhat.com/errata/RHSA-2019:0188 - --------------------------BEGIN INCLUDED TEXT-------------------- ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2019:0188-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2019:0188 Issue date: 2019-01-29 CVE Names: CVE-2018-18559 ===================================================================== 1. Summary: An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Realtime (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): * kernel: Use-after-free due to race condition in AF_PACKET implementation (CVE-2018-18559) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): * The kernel-rt packages have been upgraded to the 3.10.0-957.5.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1653822) * Under certain circumstances, the following warning message, which indicated a SCHED_DEADLINE bandwidth tracking mechanism error, occurred: WARNING: CPU: 8 PID: 19536 at kernel/sched/deadline.c:64 dequeue_task_dl+0x121/0x140 This update fixes the sched_setscheduler() core kernel function, and backports multiple upstream patches to the SCHED_DEADLINE scheduler. As a result, the SCHED_DEADLINE bandwidth tracking mechanism is prevented from error conditions, and the warning message no longer occurs. (BZ#1655439) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1641878 - CVE-2018-18559 kernel: Use-after-free due to race condition in AF_PACKET implementation 6. Package List: Red Hat Enterprise Linux for Real Time for NFV (v. 7): Source: kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm noarch: kernel-rt-doc-3.10.0-957.5.1.rt56.916.el7.noarch.rpm x86_64: kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm Red Hat Enterprise Linux Realtime (v. 7): Source: kernel-rt-3.10.0-957.5.1.rt56.916.el7.src.rpm noarch: kernel-rt-doc-3.10.0-957.5.1.rt56.916.el7.noarch.rpm x86_64: kernel-rt-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-devel-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-3.10.0-957.5.1.rt56.916.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-957.5.1.rt56.916.el7.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-2018-18559 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 2019 Red Hat, Inc. - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBXFDlwWaOgq3Tt24GAQjDqhAAnjfJ4+rAv5j6K83doJ+tSWPEKSIQ34o5 5KttJ2kNTNOw7TxtLtel/8SDPWzZ1OijbCA6HaEQJr6CLp76/eqPbRh86gg+80hP a+ZTHAx1NzlL/wSotnGL+VIGU4POdYRP0aW3MMbt9YhRQOloAmrz/B5p25/JaK0N YKuCDRTQ1rLOKye0O/A/GpEdKgqXdh69dPRuauDLWccuDaCE6JkvmMN1y+tICxKY 3TPAV3PVfm9+meXqeXNCtzrXFDUZg7rsv9Sj7KUOG9zr/2Qly3NMVvR6tV0nu/Rk AbQSfGay58lLVoMQ70FYeH9t5Uugpa/lj/twKPIYUh4M9GwIz5rnreHE7O1oz3mq HBy+fxudGbdiRZ8aKNRRQGIwmwIOwuueZz65VmXY1OSJy6srvfg2DUjegPGyvcTN j0XnhadCfmyRP9LPi1lCOTz3NOtRG5KVuI7Ai3921Aeh0cAGIQXl7xlsf28ZNmPL /FvDyu4e0/0M0Ufb48SR+yTVqOvr1qYY2APnQrXuXGZOJ5O5TH2XI7yQIv7nJ3+O I9kZUGCWUF8nWRB0k3YBs/0UnZ6VKOS5h/QoQJAauuAFFUdWJ6IJTRnvy8vBkdVd DYYezI1ixoe/+eAEgPqDg65HzDepRVWnvoNzbIcZ+QGyqsycG52c8IhbkYyYioyq Tl/0k9C53bU= =eDuz -----END PGP SIGNATURE-----