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RHEL 7: RHSA-2018-1711-01 Important: Cache Attack Risk Mitigation

An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 6 and RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 7.. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: rhev-hypervisor7 security update Advisory ID: RHSA-2018:1711-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2018:1711 Issue date: 2018-05-23 CVE Names: CVE-2018-3639 ==================================================================== 1. Summary: An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 6 and RHEV 3.X Hypervisor and Agents Extended Lifecycle Support 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: RHEL 7-based RHEV-H ELS - noarch RHEV Hypervisor for RHEL-6 ELS - noarch 3. Description: The rhev-hypervisor7 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent. 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-definedinstruction 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's data 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 is the rhev-hypervisor7 side of the CVE-2018-3639 mitigation. 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 5. Bugs fixed (https://bugzilla.redhat.com/): 1566890 - CVE-2018-3639 hw: cpu: speculative store bypass 6. Package List: RHEV Hypervisor for RHEL-6 ELS: Source: rhev-hypervisor7-7.3-20180521.1.el6ev.src.rpm noarch: rhev-hypervisor7-7.3-20180521.1.el6ev.noarch.rpm RHEL 7-based RHEV-H ELS: Source: rhev-hypervisor7-7.3-20180521.1.el7ev.src.rpm noarch: rhev-hypervisor7-7.3-20180521.1.el7ev.noarch.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 iQIVAwUBWwWQRNzjgjWX9erEAQgyCw//RQO+3f/zELvTgVoTMXZLyR25n49AMBHN Bh4/nBeTjNf5uYvRfSl173M4OBqe5zZWe7vcQ38xEUYedbIAupNVJZlbbwWMDc5n cvamxfPagKvk668iJg+WLSSi2nSSDWkzGpKpgeCnYrG3CXS+L7ml5jnsk5C68Mou yt8/UKzCpgvEDPJvx0t5lU05OPjvkYr4RHS3gB7/1LrTpcWDuu3sJiKar42mBC5v g58rCmlp3df5pOO5EgePDVHH33pUYhWxvKEAjRSYpJ6JtnHIxVW6rTBpT23C44H3 R5OyWqP1RyjwffrOorYXywlV87AqQVLcOuXllIb4JIXXOZGIBDeNaif3nXJac3I4 WntRDYa0khoQMDKwNE4xOhfh/rxCshaHIdMZnY4Jlvt/Ror9+qG1iNUDSBmIPwNo IibUc/aNKCVAGQ+RVZ5NA+PIhdOednaRIgO6MZahFa9YGCdghcDexhjZW+Jfa13C 5c4jOxhpzfG1YJwOfOdo63jKlgv8ITB9I/qXfaPEf17k4NLF694U+FIJd/GklguW hEr/d3mYh/UpBAfuQmzlWmkxo8aLBlkuMwBC+bsShiVWoBk5ue5Dl8TaNhZJH5Df ZUfLr0o2kCYRKQU9GxqPGrtQzJe0pX9ZRORTn2ILA6vl5RsmCM+JjwnpNovEAf1H NFPXOQCPShs=0rvd -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . Important security advisory for rhev-hypervisor7 addressing CVE-2018-3639 to mitigate potential cache attack risks.. RHEV Security Update,rhev-hypervisor7,Red Hat Important Update,CVE-2018-3639. . Severity: Important. LinuxSecurity.com Team

May 23, 2018 •Important Red Hat