rhsa-2018_1369
Vulnerability from csaf_redhat
Published
2018-05-10 16:05
Modified
2024-11-15 03:04
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 Moderate. 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): * QEMU: i386: multiboot OOB access while loading kernel image (CVE-2018-7550) * QEMU: cirrus: OOB access when updating VGA display (CVE-2018-7858) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Cyrille Chatras (Orange.com) and CERT-CC (Orange.com) for reporting CVE-2018-7550 and Ross Lagerwall (Citrix.com) for reporting CVE-2018-7858. Bug Fix(es): * In certain Red Hat Virtualization (RHV) guest configurations, virtual pass-through devices could not be removed properly. A reference count leak in the QEMU emulator has been removed, and the affected devices are now removed reliably. (BZ#1555213) * Previously, a raw disk image that was using the "--preallocation=full" option in some cases could not be resized. This problem has been fixed and no longer occurs. (BZ#1566587) * Due to race conditions in the virtio-blk and virtio-scsi services, the QEMU emulator sometimes terminated unexpectedly when shutting down. The race conditions have been removed, and QEMU now exits gracefully. (BZ#1566586) * Prior to this update, deleting guest snapshots using the RHV GUI in some cases failed due to an incorrect image-seeking algorithm. This update fixes the underlying code, and guest snapshots in RHV can now be deleted successfully. (BZ#1566369)
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 Moderate. 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* QEMU: i386: multiboot OOB access while loading kernel image (CVE-2018-7550)\n\n* QEMU: cirrus: OOB access when updating VGA display (CVE-2018-7858)\n\nFor more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.\n\nRed Hat would like to thank Cyrille Chatras (Orange.com) and CERT-CC (Orange.com) for reporting CVE-2018-7550 and Ross Lagerwall (Citrix.com) for reporting CVE-2018-7858.\n\nBug Fix(es):\n\n* In certain Red Hat Virtualization (RHV) guest configurations, virtual pass-through devices could not be removed properly. A reference count leak in the QEMU emulator has been removed, and the affected devices are now removed reliably. (BZ#1555213)\n\n* Previously, a raw disk image that was using the \"--preallocation=full\" option in some cases could not be resized. This problem has been fixed and no longer occurs. (BZ#1566587)\n\n* Due to race conditions in the virtio-blk and virtio-scsi services, the QEMU emulator sometimes terminated unexpectedly when shutting down. The race conditions have been removed, and QEMU now exits gracefully. (BZ#1566586)\n\n* Prior to this update, deleting guest snapshots using the RHV GUI in some cases failed due to an incorrect image-seeking algorithm. This update fixes the underlying code, and guest snapshots in RHV can now be deleted successfully. (BZ#1566369)",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "CERT-CC",
            "Cyrille Chatras"
          ],
          "organization": "Orange.com"
        }
      ],
      "cve": "CVE-2018-7550",
      "cwe": {
        "id": "CWE-787",
        "name": "Out-of-bounds Write"
      },
      "discovery_date": "2018-02-21T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1549798"
        }
      ],
      "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",
          "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": [
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          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.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": "2018-05-10T16:05:14+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_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.x86_64",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1369"
        }
      ],
      "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-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.2.x86_64",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.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": [
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          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.src",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.x86_64",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.x86_64",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.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": "2018-05-10T16:05:14+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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            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.x86_64",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1369"
        }
      ],
      "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-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7_5.2.ppc64le",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7_5.2.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7_5.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "QEMU: cirrus: OOB access when updating VGA display"
    }
  ]
}


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