rhsa-2011_0534
Vulnerability from csaf_redhat
Published
2011-05-19 11:15
Modified
2024-11-05 17:30
Summary
Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update

Notes

Topic
Updated qemu-kvm packages that fix two security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. It was found that the virtio-blk driver in qemu-kvm did not properly validate read and write requests from guests. A privileged guest user could use this flaw to crash the guest or, possibly, execute arbitrary code on the host. (CVE-2011-1750) It was found that the PIIX4 Power Management emulation layer in qemu-kvm did not properly check for hot plug eligibility during device removals. A privileged guest user could use this flaw to crash the guest or, possibly, execute arbitrary code on the host. (CVE-2011-1751) Red Hat would like to thank Nelson Elhage for reporting CVE-2011-1751. This update also fixes several bugs and adds various enhancements. Documentation for these bug fixes and enhancements will be available shortly from the Technical Notes document, linked to in the References section. All users of qemu-kvm should upgrade to these updated packages, which contain backported patches to resolve these issues, and fix the bugs and add the enhancements noted in the Technical Notes. After 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.
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": "Updated qemu-kvm packages that fix two security issues, several bugs, and\nadd various enhancements are now available for Red Hat Enterprise Linux 6.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. Common Vulnerability Scoring System (CVSS) base\nscores, which give detailed severity ratings, are available for each\nvulnerability from the CVE links in the References section.",
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        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component\nfor running virtual machines using KVM.\n\nIt was found that the virtio-blk driver in qemu-kvm did not properly\nvalidate read and write requests from guests. A privileged guest user could\nuse this flaw to crash the guest or, possibly, execute arbitrary code on\nthe host. (CVE-2011-1750)\n\nIt was found that the PIIX4 Power Management emulation layer in qemu-kvm\ndid not properly check for hot plug eligibility during device removals. A\nprivileged guest user could use this flaw to crash the guest or, possibly,\nexecute arbitrary code on the host. (CVE-2011-1751)\n\nRed Hat would like to thank Nelson Elhage for reporting CVE-2011-1751.\n\nThis update also fixes several bugs and adds various enhancements.\nDocumentation for these bug fixes and enhancements will be available\nshortly from the Technical Notes document, linked to in the References\nsection.\n\nAll users of qemu-kvm should upgrade to these updated packages, which\ncontain backported patches to resolve these issues, and fix the bugs and\nadd the enhancements noted in the Technical Notes. After installing this\nupdate, shut down all running virtual machines. Once all virtual machines\nhave shut down, start them again for this update to take effect.",
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "virtio-blk: heap buffer overflow caused by unaligned requests"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Nelson Elhage"
          ]
        }
      ],
      "cve": "CVE-2011-1751",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "discovery_date": "2011-04-25T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "699773"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The pciej_write function in hw/acpi_piix4.c in the PIIX4 Power Management emulation in qemu-kvm does not check if a device is hotpluggable before unplugging the PCI-ISA bridge, which allows privileged guest users to cause a denial of service (guest crash) and possibly execute arbitrary code by sending a crafted value to the 0xae08 (PCI_EJ_BASE) I/O port, which leads to a use-after-free related to \"active qemu timers.\"",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu: acpi_piix4: missing hotplug check during device removal",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue only affects Red Hat Enterprise Linux 6. The version of the qemu/kvm as shipped with Red Hat Enterprise Linux 5 is not affected.",
          "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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          "6ComputeNode:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
          "6Server:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
          "6Server:qemu-kvm-2:0.12.1.2-2.160.el6.src",
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          "6Server:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
          "6Workstation:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
          "6Workstation:qemu-kvm-2:0.12.1.2-2.160.el6.src",
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          "6Workstation:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
          "6Workstation:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2011-1751"
        },
        {
          "category": "external",
          "summary": "RHBZ#699773",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=699773"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-1751",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-1751"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-1751",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-1751"
        }
      ],
      "release_date": "2011-05-18T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-05-19T11:15:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
          "product_ids": [
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            "6Client:qemu-kvm-2:0.12.1.2-2.160.el6.x86_64",
            "6Client:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6Client:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
            "6ComputeNode:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.160.el6.src",
            "6ComputeNode:qemu-kvm-2:0.12.1.2-2.160.el6.x86_64",
            "6ComputeNode:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6ComputeNode:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-2:0.12.1.2-2.160.el6.src",
            "6Server:qemu-kvm-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
            "6Workstation:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
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            "6Workstation:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2011:0534"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.4,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:A/AC:M/Au:S/C:C/I:C/A:C",
            "version": "2.0"
          },
          "products": [
            "6Client:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
            "6Client:qemu-kvm-2:0.12.1.2-2.160.el6.src",
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            "6Client:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
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            "6ComputeNode:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
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            "6ComputeNode:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6ComputeNode:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-2:0.12.1.2-2.160.el6.src",
            "6Server:qemu-kvm-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6Server:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64",
            "6Workstation:qemu-img-2:0.12.1.2-2.160.el6.x86_64",
            "6Workstation:qemu-kvm-2:0.12.1.2-2.160.el6.src",
            "6Workstation:qemu-kvm-2:0.12.1.2-2.160.el6.x86_64",
            "6Workstation:qemu-kvm-debuginfo-2:0.12.1.2-2.160.el6.x86_64",
            "6Workstation:qemu-kvm-tools-2:0.12.1.2-2.160.el6.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "qemu: acpi_piix4: missing hotplug check during device removal"
    }
  ]
}


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