rhsa-2018_0023
Vulnerability from csaf_redhat
Published
2018-01-04 17:00
Modified
2024-11-14 23:40
Summary
Red Hat Security Advisory: qemu-kvm security update
Notes
Topic
An update for qemu-kvm is now available 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.
Details
Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM.
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)
Note: This is the qemu-kvm side of the CVE-2017-5715 mitigation.
Red Hat would like to thank Google Project Zero for reporting this issue.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Important" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.\n\nRed 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.", "title": "Topic" }, { "category": "general", "text": "Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM.\n\nSecurity Fix(es):\n\n* 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\u0027s 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)\n\nNote: This is the qemu-kvm side of the CVE-2017-5715 mitigation.\n\nRed Hat would like to thank Google Project Zero for reporting this issue.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2018:0023", "url": "https://access.redhat.com/errata/RHSA-2018:0023" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#important", "url": "https://access.redhat.com/security/updates/classification/#important" }, { "category": "external", "summary": "https://access.redhat.com/security/vulnerabilities/speculativeexecution", "url": "https://access.redhat.com/security/vulnerabilities/speculativeexecution" }, { "category": "external", "summary": "https://access.redhat.com/security/cve/CVE-2017-5715", "url": "https://access.redhat.com/security/cve/CVE-2017-5715" }, { "category": "external", "summary": "1519780", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1519780" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2018/rhsa-2018_0023.json" } ], "title": "Red Hat Security Advisory: qemu-kvm security update", "tracking": { "current_release_date": "2024-11-14T23:40:20+00:00", "generator": { "date": "2024-11-14T23:40:20+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2018:0023", "initial_release_date": "2018-01-04T17:00:59+00:00", "revision_history": [ { "date": "2018-01-04T17:00:59+00:00", "number": "1", "summary": "Initial version" }, { "date": "2018-01-04T17:00:59+00:00", "number": "2", "summary": "Last 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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\u0027s 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.", "title": "Vulnerability description" }, { "category": "summary", "text": "hw: cpu: speculative execution branch target injection", "title": "Vulnerability summary" }, { "category": "other", "text": "Please see the Vulnerability Response article for the full list of updates available and a detailed discussion of this issue.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Client-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64", "7Client-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64le", "7Client-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.x86_64", "7Client-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.src", "7Client-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.x86_64", "7Client-7.4.Z:qemu-kvm-common-10:1.5.3-141.el7_4.6.x86_64", "7Client-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64", "7Client-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64le", "7Client-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.x86_64", "7Client-7.4.Z:qemu-kvm-tools-10:1.5.3-141.el7_4.6.x86_64", "7ComputeNode-optional-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64", "7ComputeNode-optional-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64le", "7ComputeNode-optional-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.x86_64", "7ComputeNode-optional-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.src", "7ComputeNode-optional-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.x86_64", "7ComputeNode-optional-7.4.Z:qemu-kvm-common-10:1.5.3-141.el7_4.6.x86_64", "7ComputeNode-optional-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64", "7ComputeNode-optional-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64le", "7ComputeNode-optional-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.x86_64", "7ComputeNode-optional-7.4.Z:qemu-kvm-tools-10:1.5.3-141.el7_4.6.x86_64", "7Server-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64", "7Server-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64le", "7Server-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.x86_64", "7Server-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.src", "7Server-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.x86_64", "7Server-7.4.Z:qemu-kvm-common-10:1.5.3-141.el7_4.6.x86_64", "7Server-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64", "7Server-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64le", "7Server-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.x86_64", "7Server-7.4.Z:qemu-kvm-tools-10:1.5.3-141.el7_4.6.x86_64", "7Workstation-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64", "7Workstation-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.ppc64le", "7Workstation-7.4.Z:qemu-img-10:1.5.3-141.el7_4.6.x86_64", "7Workstation-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.src", "7Workstation-7.4.Z:qemu-kvm-10:1.5.3-141.el7_4.6.x86_64", "7Workstation-7.4.Z:qemu-kvm-common-10:1.5.3-141.el7_4.6.x86_64", "7Workstation-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64", "7Workstation-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.ppc64le", "7Workstation-7.4.Z:qemu-kvm-debuginfo-10:1.5.3-141.el7_4.6.x86_64", "7Workstation-7.4.Z:qemu-kvm-tools-10:1.5.3-141.el7_4.6.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2017-5715" }, { "category": "external", "summary": "RHBZ#1519780", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1519780" }, { "category": "external", "summary": "RHSB-speculativeexecution", "url": "https://access.redhat.com/security/vulnerabilities/speculativeexecution" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2017-5715", "url": "https://www.cve.org/CVERecord?id=CVE-2017-5715" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-5715", "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-5715" }, { "category": "external", "summary": "https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html", "url": "https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html" }, { "category": "external", "summary": "https://meltdownattack.com", "url": "https://meltdownattack.com" }, { "category": "external", "summary": "https://spectreattack.com/", "url": "https://spectreattack.com/" } ], "release_date": "2018-01-03T22:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2018-01-04T17:00:59+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing this update, shut down all running virtual machines. 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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.