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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.2220 Important: kernel-rt security and bug fix update 6 September 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Impact/Access: Root Compromise -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-7533 Reference: ESB-2017.2214 ESB-2017.2162 ESB-2017.2075 ESB-2017.2033.2 Original Bulletin: https://access.redhat.com/errata/RHSA-2017:2585 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2017:2585-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2017:2585 Issue date: 2017-09-05 CVE Names: CVE-2017-7533 ===================================================================== 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): * A race condition was found in the Linux kernel, present since v3.14-rc1 through v4.12. The race happens between threads of inotify_handle_event() and vfs_rename() while running the rename operation against the same file. As a result of the race the next slab data or the slab's free list pointer can be corrupted with attacker-controlled data, which may lead to the privilege escalation. (CVE-2017-7533, Important) Red Hat would like to thank Leilei Lin (Alibaba Group), Fan Wu (The University of Hong Kong), and Shixiong Zhao (The University of Hong Kong) for reporting this issue. Bug Fix(es): * The kernel-rt packages have been upgraded to the 3.10.0-693.2.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1473393) (BZ#1473393) 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/): 1468283 - CVE-2017-7533 kernel: a race between inotify_handle_event() and sys_rename() 1473393 - kernel-rt: update to the RHEL7.4.z batch#1 source tree 6. Package List: Red Hat Enterprise Linux for Real Time for NFV (v. 7): Source: kernel-rt-3.10.0-693.2.1.rt56.620.el7.src.rpm noarch: kernel-rt-doc-3.10.0-693.2.1.rt56.620.el7.noarch.rpm x86_64: kernel-rt-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-devel-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-kvm-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm Red Hat Enterprise Linux Realtime (v. 7): Source: kernel-rt-3.10.0-693.2.1.rt56.620.el7.src.rpm noarch: kernel-rt-doc-3.10.0-693.2.1.rt56.620.el7.noarch.rpm x86_64: kernel-rt-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-devel-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-693.2.1.rt56.620.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-693.2.1.rt56.620.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-2017-7533 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 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFZrouMXlSAg2UNWIIRAv5rAKC1UlIQHWVS0yNohICjEzc41xRB+wCgnlKz 1l6n7DyYeBaTPec0bjQpMwk= =nq1k - -----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 iQIVAwUBWa85aox+lLeg9Ub1AQhCDw//XyXFQHoUx5lgAKC18mZdGmQatFmzRvEO aCpJwoR41S2HS9h2eJT2KM1/HZ8d9yAKQQyQCg31EuaCCg7OcHEU1vnoNUHHm+FI MGdwTzppBKjqhMn4aAD2W9KkNpv6x8YRLSC24/5BLKGm0/ZK5i2jIF9DftH9KbIL kFJYlN0kgHDyaEvyaHm53h+8viY/4MreM0n9gajvZR0585dQqgFvedUKjvr9Yaka 4cYG1PdUABBsO4GoG0G1uG4MrK0aOECmGi9LsPZvdAHXqLKy41QC1kx456fnSHfe oBKTDMzP1XkfTAGcyCPAW/N5Gr4gT1cOqrpdgIwMN94NvktoYvbMjM/rmoZcazwN jEXyGqPhvcY3o9pEKjhaabOrSkN9iIeuewLDsZ7UavMqGhuzgbdIjJVKbyC3KUoE akkllLOFGBikLF6kj6KGtirLVT7BXwVW4VVJHVzl/6SvmknAzsX0n9sPE/AoYmyY gXyP7tSo1dox8ogOA+pYo/xvGoIg1EVLgV3GQX9nn5LEURyoCTvAjVByQwkD2brO TEoJfCf7iPNrQjoQYbsFka236AHO8uygVu7blJS6HLlX85ZPNaiwvG8Mpf1wncgk qv131wE2mq7HBzlDblH4NxFAc+QvTJwYRFxFiRvlgVAV+BK1LG+CWlvJBVZjaKw+ mYP69IaAidI= =zW7u -----END PGP SIGNATURE-----