Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1290 Important: kernel security and bug fix update 26 April 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 5 Impact/Access: Access Privileged Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2017-5715 CVE-2013-2929 Original Bulletin: https://access.redhat.com/errata/RHSA-2018:1252 - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2018:1252-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1252 Issue date: 2018-04-25 CVE Names: CVE-2013-2929 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 5.9 Long Life. 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 Long Life (v. 5.9 server) - i386, ia64, noarch, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation into the microprocessor's data cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715, Important, x86-64) * kernel: exec/ptrace: get_dumpable() incorrect tests (CVE-2013-2929, Low) 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. Red Hat would like to thank Google Project Zero for reporting CVE-2017-5715. Bug Fix(es): * The Return Trampolines (Retpolines) mechanism is a software construct that leverages specific knowledge of the underlying hardware to mitigate the branch target injection, also known as Spectre variant 2 vulnerability described in CVE-2017-5715. With this update, the support for Retpolines has been implemented into the Red Hat Enterprise Linux kernel. (BZ#1539655) 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/): 1028148 - CVE-2013-2929 kernel: exec/ptrace: get_dumpable() incorrect tests 1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection 6. Package List: Red Hat Enterprise Linux Long Life (v. 5.9 server): Source: kernel-2.6.18-348.39.1.el5.src.rpm i386: kernel-2.6.18-348.39.1.el5.i686.rpm kernel-PAE-2.6.18-348.39.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-348.39.1.el5.i686.rpm kernel-PAE-devel-2.6.18-348.39.1.el5.i686.rpm kernel-debug-2.6.18-348.39.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-348.39.1.el5.i686.rpm kernel-debug-devel-2.6.18-348.39.1.el5.i686.rpm kernel-debuginfo-2.6.18-348.39.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-348.39.1.el5.i686.rpm kernel-devel-2.6.18-348.39.1.el5.i686.rpm kernel-headers-2.6.18-348.39.1.el5.i386.rpm kernel-xen-2.6.18-348.39.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-348.39.1.el5.i686.rpm kernel-xen-devel-2.6.18-348.39.1.el5.i686.rpm ia64: kernel-2.6.18-348.39.1.el5.ia64.rpm kernel-debug-2.6.18-348.39.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-348.39.1.el5.ia64.rpm kernel-debug-devel-2.6.18-348.39.1.el5.ia64.rpm kernel-debuginfo-2.6.18-348.39.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-348.39.1.el5.ia64.rpm kernel-devel-2.6.18-348.39.1.el5.ia64.rpm kernel-headers-2.6.18-348.39.1.el5.ia64.rpm kernel-xen-2.6.18-348.39.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-348.39.1.el5.ia64.rpm kernel-xen-devel-2.6.18-348.39.1.el5.ia64.rpm noarch: kernel-doc-2.6.18-348.39.1.el5.noarch.rpm x86_64: kernel-2.6.18-348.39.1.el5.x86_64.rpm kernel-debug-2.6.18-348.39.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-348.39.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-348.39.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-348.39.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-348.39.1.el5.x86_64.rpm kernel-devel-2.6.18-348.39.1.el5.x86_64.rpm kernel-headers-2.6.18-348.39.1.el5.x86_64.rpm kernel-xen-2.6.18-348.39.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-348.39.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-348.39.1.el5.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-2013-2929 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/speculativeexecution https://access.redhat.com/security/cve/CVE-2017-5715 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFa4ObyXlSAg2UNWIIRAtmLAJwIbmWPqCcJ+NQVS0Cx2HS6PDfCuACfdkMq FLO27DCjrk7kGZKQL8M4ziQ= =x3yQ - -----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: 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 iQIVAwUBWuFpaox+lLeg9Ub1AQisGw//ZelMKykI7ZOsF+9nrSvuJnxkg9bkH4eL CHCGNl+rCdGnAk2z6V38aozl/aSWoeEedGqqyckNqQ2qrFHTAlZsOCayF0NBNejC Ynfyplwc4gE6Hqg7IEMiiF/9fnyMtO7fMoD4e6OMXCoKamdWryoXz4srmClAKSJR aoF2KgqnRxTrrg1DSwNvyQs9vavwbqULZRxDEZuiZktMBKuKJur/caZlYUCTRdQ+ dS7M6m3kny5m6JBx5Vk9h3a+s6irj9mR6EKy+lgXt2R4vyxkddtGCJtXNZ2eFojd fczZJul2IsiVaI2mvwZk0vY9jPNrn6tIqOwawF+JqevDlg7jMFLwHG/JW9iO2kV6 62TEidGTiWKRESIdUr1XeACC/gUL8+po6/46/dcOl0Uu60BHoSmEd+4T30s7GVAd vP+K7/5OXS7x2I4h4n10aUy2Jx7KpEPzyJob3ECJJK+UfN9wdLlIwStyk5uV1HJn TENsFMgau07sMFiOXOinjgxegEbMHooR6WLzmW5UFv/6Qs2WU/+KjLZHdhiqOvKG 22cIaU+UXeFSawx5fRBRerxjl1vksRVvxFheoecB3QKa7m3GvCkpDc7orDSfO0qq w10arMLEkGX2GT88/JKjw1rafSxpuUwLVPTuAi93EENO6m6W/alD8hxf1pMOyVA4 FSLrwK4tajM= =Z/oZ -----END PGP SIGNATURE-----