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Red Hat 7.3 RHSA-2018:1636-01 Important: Kernel Cache Attack Mitigation

An update for kernel is now available for Red Hat Enterprise Linux 7.3 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score,. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2018:1636-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:1636 Issue date: 2018-05-22 CVE Names: CVE-2018-3639 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7.3 Extended Update Support. 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 ComputeNode EUS (v. 7.3) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) - x86_64 Red Hat Enterprise Linux Server EUS (v. 7.3) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 7.3) - ppc64, ppc64le, 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 Load & Store instructions (a commonly used performance optimization). It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory read from address to which a recent memory write has occurred may see an older value and subsequently cause an update into the microprocessor'sdata cache even for speculatively executed instructions that never actually commit (retire). As a result, an unprivileged attacker could use this flaw to read privileged memory by conducting targeted cache side-channel attacks. (CVE-2018-3639) Note: This issue is present in hardware and cannot be fully fixed via software update. The updated kernel packages provide software side of the mitigation for this hardware issue. To be fully functional, up-to-date CPU microcode applied on the system is required. Please refer to References section for further information about this issue, CPU microcode requirements and the potential performance impact. In this update mitigations for x86-64 architecture are provided. Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue. 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/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: Red Hat Enterprise Linux ComputeNode EUS (v.7.3): Source: kernel-3.10.0-514.48.5.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.48.5.el7.noarch.rpm kernel-doc-3.10.0-514.48.5.el7.noarch.rpm x86_64: kernel-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.5.el7.x86_64.rpm kernel-devel-3.10.0-514.48.5.el7.x86_64.rpm kernel-headers-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.48.5.el7.x86_64.rpm perf-3.10.0-514.48.5.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm python-perf-3.10.0-514.48.5.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3): x86_64: kernel-debug-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.48.5.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm Red Hat Enterprise Linux Server EUS (v.7.3): Source: kernel-3.10.0-514.48.5.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.48.5.el7.noarch.rpm kernel-doc-3.10.0-514.48.5.el7.noarch.rpm ppc64: kernel-3.10.0-514.48.5.el7.ppc64.rpm kernel-bootwrapper-3.10.0-514.48.5.el7.ppc64.rpm kernel-debug-3.10.0-514.48.5.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-debug-devel-3.10.0-514.48.5.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.48.5.el7.ppc64.rpm kernel-devel-3.10.0-514.48.5.el7.ppc64.rpm kernel-headers-3.10.0-514.48.5.el7.ppc64.rpm kernel-tools-3.10.0-514.48.5.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-tools-libs-3.10.0-514.48.5.el7.ppc64.rpm perf-3.10.0-514.48.5.el7.ppc64.rpm perf-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm python-perf-3.10.0-514.48.5.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm ppc64le: kernel-3.10.0-514.48.5.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debug-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.48.5.el7.ppc64le.rpm kernel-devel-3.10.0-514.48.5.el7.ppc64le.rpm kernel-headers-3.10.0-514.48.5.el7.ppc64le.rpm kernel-tools-3.10.0-514.48.5.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-tools-libs-3.10.0-514.48.5.el7.ppc64le.rpm perf-3.10.0-514.48.5.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm python-perf-3.10.0-514.48.5.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm s390x: kernel-3.10.0-514.48.5.el7.s390x.rpm kernel-debug-3.10.0-514.48.5.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-514.48.5.el7.s390x.rpm kernel-debug-devel-3.10.0-514.48.5.el7.s390x.rpm kernel-debuginfo-3.10.0-514.48.5.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-514.48.5.el7.s390x.rpm kernel-devel-3.10.0-514.48.5.el7.s390x.rpm kernel-headers-3.10.0-514.48.5.el7.s390x.rpm kernel-kdump-3.10.0-514.48.5.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-514.48.5.el7.s390x.rpm kernel-kdump-devel-3.10.0-514.48.5.el7.s390x.rpm perf-3.10.0-514.48.5.el7.s390x.rpm perf-debuginfo-3.10.0-514.48.5.el7.s390x.rpm python-perf-3.10.0-514.48.5.el7.s390x.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.s390x.rpm x86_64: kernel-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.5.el7.x86_64.rpm kernel-devel-3.10.0-514.48.5.el7.x86_64.rpm kernel-headers-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.48.5.el7.x86_64.rpm perf-3.10.0-514.48.5.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm python-perf-3.10.0-514.48.5.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v.7.3): ppc64: kernel-debug-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.48.5.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-514.48.5.el7.ppc64.rpm perf-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debug-devel-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.48.5.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-514.48.5.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.48.5.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.48.5.el7.x86_64.rpm perf-debuginfo-3.10.0-514.48.5.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.48.5.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-2018-3639 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/ssbd 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPGv1 iQIVAwUBWwRMmdzjgjWX9erEAQiTuw//Xvt6LdD/07qYBRfnuIYGqqikxj5xmrPH 378/xB4R0yTzT03cn/YriDr+/e9O7zqAa9zQr7CqxKCl8P3Blh2bqCX/5+Yk/bhr 582N3ReQ836uTyQ8M++jJnp4S3AjhGt4N5LPNB4tTakuKDuc8SW354jwHP+cUeEu pvO/kXRTsuGaf/jgvIzXfJQJXwXea9mEfV0o7D/IzKSDB8aV9U+hb23GCqvPQLTl rzqpusyZl3iPTfcHPgY8/jbVixvBBzahqhaKps8TClj6gH2Ah553rBuTIjNHLBQg YTz+m9/7hDd3bkzLwxd92C3zKZBRcSoME9kcXgHKr4Obl1oqImS1p5Jap2/eNiR6 0ODVFKwL23mq8LllLZXsh06z/mXH/2Fi276ECkbl3ho6Gja12D7iq9cIyXMR5+a7 kmtwvCs3hmZ0BwPK892HRRfcA72aowCnt3+oichswA9TW1km77QlNOhkJg0e80vE sWarqf7qOG2jGlG14iqM+WCLPrHQqX8lzaiHT0jMH7/rx02zJ9wLmE/ePGVArf0k FDL5RyhkV8pG041HMKUJcTu36IWpbrTxnVFWhfj65eVY8GoqlV8yvAJEx0SpBqoF pbrTCxF2jKcLqGArx+/3HzZP62+GO30Uwa44UWIRw6WcM1tpgQOXrcVMJz8z8x82 vTgAOPbNMf4=aJjb -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . A crucial security patch for CentOS 7.3 addresses significant vulnerabilities, strengthening protection against data leakage via speculative execution attacks.. Kernel Update, Red Hat Enterprise, Security Advisory, Cache Side-Channel, Linux Support. . Severity: Important. LinuxSecurity.com Team

May 22, 2018 •Important Red Hat