rhsa-2018_1645
Vulnerability from csaf_redhat
Published
2018-05-22 01:41
Modified
2024-11-05 20:34
Summary
Red Hat Security Advisory: qemu-kvm-rhev security update

Notes

Topic
An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform 9.0 (Mitaka). 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) Note: This is the qemu-kvm-rhev 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.
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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          "title": "Vulnerability description"
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          "text": "hw: cpu: speculative store bypass",
          "title": "Vulnerability summary"
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          "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"
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        {
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          "summary": "https://software.intel.com/sites/default/files/managed/b9/f9/336983-Intel-Analysis-of-Speculative-Execution-Side-Channels-White-Paper.pdf",
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        {
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          "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"
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      "release_date": "2018-05-21T21:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-05-22T01:41:01+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.",
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            "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"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
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      ],
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          "organization": "Orange.com"
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        "name": "Out-of-bounds Write"
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          "text": "1549798"
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      "notes": [
        {
          "category": "description",
          "text": "Quick Emulator (QEMU), compiled with the PC System Emulator with multiboot feature support, is vulnerable to an OOB r/w memory access issue. The issue could occur while loading a kernel image during the guest boot, if mh_load_end_addr address is greater than the mh_bss_end_addr address. A user or process could use this flaw to potentially achieve arbitrary code execution on a host.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: i386: multiboot OOB access while loading kernel image",
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        },
        {
          "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.",
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        "fixed": [
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          "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-7550"
        },
        {
          "category": "external",
          "summary": "RHBZ#1549798",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1549798"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-7550",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-7550"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-7550",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7550"
        }
      ],
      "release_date": "2018-02-27T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-05-22T01:41:01+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-RH7-RHOS-9.0:qemu-img-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1645"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 6.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:H/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.0"
          },
          "products": [
            "7Server-RH7-RHOS-9.0:qemu-img-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "QEMU: i386: multiboot OOB access while loading kernel image"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Ross Lagerwall"
          ],
          "organization": "Citrix.com"
        }
      ],
      "cve": "CVE-2018-7858",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2018-02-28T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1553402"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Quick Emulator (aka QEMU), when built with the Cirrus CLGD 54xx VGA Emulator support, allows local guest OS privileged users to cause a denial of service (out-of-bounds access and QEMU process crash) by leveraging incorrect region calculation when updating VGA display.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: cirrus: OOB access when updating VGA display",
          "title": "Vulnerability summary"
        },
        {
          "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": [
          "7Server-RH7-RHOS-9.0:qemu-img-rhev-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
          "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-7858"
        },
        {
          "category": "external",
          "summary": "RHBZ#1553402",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1553402"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-7858",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-7858"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-7858",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-7858"
        }
      ],
      "release_date": "2018-03-08T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-05-22T01:41:01+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-RH7-RHOS-9.0:qemu-img-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1645"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.9,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:M/Au:S/C:P/I:P/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L",
            "version": "3.0"
          },
          "products": [
            "7Server-RH7-RHOS-9.0:qemu-img-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.src",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.3.x86_64",
            "7Server-RH7-RHOS-9.0:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "QEMU: cirrus: OOB access when updating VGA display"
    }
  ]
}


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