rhsa-2018_2060
Vulnerability from csaf_redhat
Published
2018-06-27 08:25
Modified
2024-11-15 02:10
Summary
Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

Notes

Topic
An update for qemu-kvm-rhev 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.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. 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'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) Red Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue. Note: This is the qemu-kvm-rhev side of the CVE-2018-3639 mitigation that includes support for guests running on hosts with AMD processors. Bug Fix(es): * Previously, using device passthrough for a SCSI-2 device failed and returned an "Illegal Request" error. With this update, the QEMU emulator checks the SCSI version of the device when performing passthrough. As a result, the described problem no longer occurs. (BZ#1571370) * Under certain circumstances, resuming a paused guest generated redundant "VIR_DOMAIN_PAUSED_UNKNOWN" error messages in the libvirt log. This update corrects the event sending order when resuming guests, which prevents the errors being logged. (BZ#1582122) Enhancement(s): * With this update, Ceph storage is supported by KVM virtualization on all CPU architectures supported by Red Hat. (BZ#1588001)
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.


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        "text": "An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 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.",
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        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.\n\nSecurity Fix(es):\n\n* An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load \u0026 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\u0027s 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)\n\nRed Hat would like to thank Ken Johnson (Microsoft Security Response Center) and Jann Horn (Google Project Zero) for reporting this issue.\n\nNote: This is the qemu-kvm-rhev side of the CVE-2018-3639 mitigation that includes support for guests running on hosts with AMD processors.\n\nBug Fix(es):\n\n* Previously, using device passthrough for a SCSI-2 device failed and returned an \"Illegal Request\" error. With this update, the QEMU emulator checks the SCSI version of the device when performing passthrough. As a result, the described problem no longer occurs. (BZ#1571370)\n \n* Under certain circumstances, resuming a paused guest generated redundant \"VIR_DOMAIN_PAUSED_UNKNOWN\" error messages in the libvirt log. This update corrects the event sending order when resuming guests, which prevents the errors being logged. (BZ#1582122)\n\nEnhancement(s):\n\n* With this update, Ceph storage is supported by KVM virtualization on all CPU architectures supported by Red Hat. (BZ#1588001)",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Jann Horn"
          ],
          "organization": "Google Project Zero"
        },
        {
          "names": [
            "Ken Johnson"
          ],
          "organization": "Microsoft Security Response Center"
        }
      ],
      "cve": "CVE-2018-3639",
      "cwe": {
        "id": "CWE-200",
        "name": "Exposure of Sensitive Information to an Unauthorized Actor"
      },
      "discovery_date": "2018-03-12T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1566890"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of Load \u0026 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\u0027s 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.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "hw: cpu: speculative store bypass",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat Product Security is aware of this issue. Updates will be released as they become available. For additional information, please refer to the Red Hat Knowledgebase article: https://access.redhat.com/security/vulnerabilities/ssbd",
          "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": [
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          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.src",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.x86_64",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.x86_64",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-3639"
        },
        {
          "category": "external",
          "summary": "RHBZ#1566890",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1566890"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-3639",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-3639"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-3639",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-3639"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/vulnerabilities/ssbd",
          "url": "https://access.redhat.com/security/vulnerabilities/ssbd"
        },
        {
          "category": "external",
          "summary": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1528",
          "url": "https://bugs.chromium.org/p/project-zero/issues/detail?id=1528"
        },
        {
          "category": "external",
          "summary": "https://software.intel.com/sites/default/files/managed/b9/f9/336983-Intel-Analysis-of-Speculative-Execution-Side-Channels-White-Paper.pdf",
          "url": "https://software.intel.com/sites/default/files/managed/b9/f9/336983-Intel-Analysis-of-Speculative-Execution-Side-Channels-White-Paper.pdf"
        },
        {
          "category": "external",
          "summary": "https://software.intel.com/sites/default/files/managed/c5/63/336996-Speculative-Execution-Side-Channel-Mitigations.pdf",
          "url": "https://software.intel.com/sites/default/files/managed/c5/63/336996-Speculative-Execution-Side-Channel-Mitigations.pdf"
        },
        {
          "category": "external",
          "summary": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html",
          "url": "https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html"
        }
      ],
      "release_date": "2018-05-21T21:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-06-27T08:25:23+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. Once all virtual machines have shut down, start them again for this update to take effect.",
          "product_ids": [
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:2060"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.6,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.0"
          },
          "products": [
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.4.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.4.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "hw: cpu: speculative store bypass"
    }
  ]
}


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