-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ===================================================================== Red Hat Security Advisory Synopsis: Important: redhat-virtualization-host security update Advisory ID: RHSA-2019:1207-01 Product: Red Hat Virtualization Advisory URL: https://access.redhat.com/errata/RHSA-2019:1207 Issue date: 2019-05-14 CVE Names: CVE-2018-12126 CVE-2018-12127 CVE-2018-12130 CVE-2019-11091 ===================================================================== 1. Summary: An update for redhat-release-virtualization-host and redhat-virtualization-host is now available for Red Hat Virtualization 4 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 for RHEV 4 (build requirements) - noarch, x86_64 Red Hat Virtualization 4 Hypervisor for RHEL 7 - noarch 3. Description: The redhat-virtualization-host 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. 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): * A flaw was found in the implementation of the "fill buffer", a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer. (CVE-2018-12130) * Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer. (CVE-2018-12126) * Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU’s pipelines. Stale load operations results are stored in the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel. (CVE-2018-12127) * Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. (CVE-2019-11091) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 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/2974891 5. Bugs fixed (https://bugzilla.redhat.com/): 1646781 - CVE-2018-12126 hardware: Microarchitectural Store Buffer Data Sampling (MSBDS) 1646784 - CVE-2018-12130 hardware: Microarchitectural Fill Buffer Data Sampling (MFBDS) 1667782 - CVE-2018-12127 hardware: Micro-architectural Load Port Data Sampling - Information Leak (MLPDS) 1705312 - CVE-2019-11091 hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM) 6. Package List: Red Hat Virtualization 4 Hypervisor for RHEL 7: Source: redhat-virtualization-host-4.3-20190512.0.el7_6.src.rpm noarch: redhat-virtualization-host-image-update-4.3-20190512.0.el7_6.noarch.rpm RHEL 7-based RHEV-H for RHEV 4 (build requirements): Source: redhat-release-virtualization-host-4.3-0.7.el7.src.rpm noarch: redhat-virtualization-host-image-update-placeholder-4.3-0.7.el7.noarch.rpm x86_64: redhat-release-virtualization-host-4.3-0.7.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-2018-12126 https://access.redhat.com/security/cve/CVE-2018-12127 https://access.redhat.com/security/cve/CVE-2018-12130 https://access.redhat.com/security/cve/CVE-2019-11091 https://access.redhat.com/security/vulnerabilities/mds https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2019 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBXNsvSdzjgjWX9erEAQi7AQ//ZcoG4N8eMSQOqsvzztqmK0SnKf2/8xds Eg/ZPjC3PeIlWjB9OKTo5voyai5FUVb2CkP4cCca9fpvjEBWU42y+hSUHlNtzkTX ydW4Jiq3dXhai73l9uJYr4Hp+FLHzHlMrGpic5YruLSi9Aai/Lv45lSoeIQBEmeg wVexUmtWwNgnWdH6ZP09p+rC+MT4WYV7CfUU/uYOz5uQjrddkEmvZTA6zzvsxuKj nNCYYHE1QI0ieCbUoHBa+bSQ+ji6qNHMmfFVDVm+eFzcIf71TRY2RCDfdZYuHQex NfMBWnz0TRAkHEgnfpe2vGBk+V8vaCywktRH26JDDQm8zmvw22yGA0W1YPmqylUi ZM30cYOq7epKuLc5eLjnI2SYtXYCDPeQ6keCTdH3m0DEUJQXQwZmEU+zlsJjlnIX N9aW0LJLpJ9Y0MpqAxtdPKn4E6426PZO9o58FdogeFUE13CtQcXEPQkc8gUOpu9n Dd/h/8eGMTEaOuGYUEODbm+QA+yWRrS2Rw3nH+GdULc8VNJBAQMI5mvwanq4DXud s5DFw5ZmBnxfWYqHt6oCj37rRaO+Idqi1vPd9LA37NJueNeCPzOIzZTL09BcBwnb oODqiKd2gnK8cnq5VtZFJQTjHeCgWUdZY1jLMg+dmap0mgPBFgNBKRgnojdSowKm lRdgzavCF9E= =Tt+P -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce