Stay Secure with the Latest Linux Advisories

security advisoryimportantspeculative execution

Red Hat 7: RHSA-2018:1710-01 Important: Speculative Store Bypass

An update for redhat-virtualization-host is now available for 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. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: redhat-virtualization-host security update Advisory ID: RHSA-2018:1710-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2018:1710 Issue date: 2018-05-23 CVE Names: CVE-2018-3639 ==================================================================== 1. Summary: An update for redhat-virtualization-host is now available for 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 3. Description: The ovirt-node-ng packages provide the Red Hat Virtualization Host. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. Red Hat Virtualization Hosts (RHVH) are installed using a special build of Red Hat Enterprise Linux with only the packages required to host virtual machines. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. 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 fromaddress 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 redhat-virtualization-host 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 1580328 - Include wrong kernel package in RHVH-3.6-20180518.1-RHVH-x86_64-dvd1.iso 6. Package List: RHEL 7-based RHEV-H ELS: Source: redhat-virtualization-host-3.6-20180521.0.el7_3.src.rpm noarch: redhat-virtualization-host-image-update-3.6-20180521.0.el7_3.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 iQIVAwUBWwWPYNzjgjWX9erEAQhyJw/+KSCYubvokoEsPVkqQhpTBXzE6HHW1jxC 1/r2tdomlyJ5w9TNiB/+i8Z2shmMTyYDi1aj4piTOPxrDdXUYURwkDWmtO+rxbAQ gHkyCCb0DWLJcbsMACXip+wfjcEY6SC89DvPeig7SlpVSeoew+JqYI7AutOCDMgH Nb5nSjVmESLa1q/sg8hR97D39fFb62fzPbVoQG7PD8kCE4BVV2nzA0Waeb7geb37 pjGBuw6lsrqVbDPRRts4Sxzg+vqkDAy3cuAZ4bSu1gHa8p1Z68l/GiiPxN5w2N3c OBRn3ij6X7kKuACnlWXQSJE+nIfUsm9A7u8gnY6RfvvBU2icY3TLL2H65WJDk68x kOZOkr5G6pdst2RHDV5zK+v8ZH3ff3QUYQ8ckftrl8Nau6Q6ywQq/LFOo+/jktzk rLXe71U49nEG3ZwEOSqX2zuyAZWEc+p0hb9YlZosIgCA8KJzCztf6NzmQGTcp9+V 8Wl2hVneeEUQZtM96wWP/tPJ7mUJgK2zdApGeKibRFB0zyZbVz1QbmvHsy1y0gtq bSRIblNDA9CEp0PcoxFYIkUhOzkqCAYxaKYu3zdJWfGUhMy/5lhBYN6rO49LRPMi ZBnPbZTrtEmxal+KSuKriLiNNHJCq4PfCajtuxLMYp5AEFGQ1yYCwiKjhYtjKePJ Oa3Yj7eO2JI=DSkx -----END PGP SIGNATURE----- -- RHSA-announce mailing list This email address is being protected from spambots. You need JavaScript enabled to view it. . Hash: SHA256 Red Hat Security Advisory Synopsis: Important: redhat-virtualization-host security upda. update, redhat-virtualization-host, hypervisor, agents, extende. . Severity: Important. LinuxSecurity.com Team

May 23, 2018 •Important Red Hat