rhsa-2015_0868
Vulnerability from csaf_redhat
Published
2015-04-21 18:00
Modified
2024-11-14 16:31
Summary
Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

Notes

Topic
Updated qemu-kvm-rhev packages that fix one security issue and one bug are now available for Red Hat Enterprise Virtualization. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM in environments managed by Red Hat Enterprise Virtualization Manager. It was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to write outside of VRAM-allocated buffer boundaries in the host's QEMU process address space with attacker-provided data. (CVE-2014-8106) This issue was discovered by Paolo Bonzini of Red Hat. This update also fixes the following bug: * Previously, the effective downtime during the last phase of a live migration would sometimes be much higher than the maximum downtime specified by 'migration_downtime' in vdsm.conf. This problem has been corrected. The value of 'migration_downtime' is now honored and the migration is aborted if the downtime cannot be achieved. (BZ#1142756) All users of qemu-kvm-rhev are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. 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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      {
        "category": "summary",
        "text": "Updated qemu-kvm-rhev packages that fix one security issue and one bug are\nnow available for Red Hat Enterprise Virtualization.\n\nRed Hat Product Security has rated this update as having Important security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.",
        "title": "Topic"
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        "text": "KVM (Kernel-based Virtual Machine) is a full virtualization solution for\nLinux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the\nuser-space component for running virtual machines using KVM in environments\nmanaged by Red Hat Enterprise Virtualization Manager.\n\nIt was found that the Cirrus blit region checks were insufficient. A\nprivileged guest user could use this flaw to write outside of\nVRAM-allocated buffer boundaries in the host\u0027s QEMU process address space\nwith attacker-provided data. (CVE-2014-8106)\n\nThis issue was discovered by Paolo Bonzini of Red Hat.\n\nThis update also fixes the following bug:\n\n* Previously, the effective downtime during the last phase of a live\nmigration would sometimes be much higher than the maximum downtime\nspecified by \u0027migration_downtime\u0027 in vdsm.conf. This problem has been\ncorrected. The value of \u0027migration_downtime\u0027 is now honored and the\nmigration is aborted if the downtime cannot be achieved. (BZ#1142756)\n\nAll users of qemu-kvm-rhev are advised to upgrade to these updated\npackages, which contain a backported patch to correct this issue. After\ninstalling this update, shut down all running virtual machines. Once all\nvirtual machines have shut down, start them again for this update to take\neffect.",
        "title": "Details"
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        "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.",
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_0868.json"
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    ],
    "title": "Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update",
    "tracking": {
      "current_release_date": "2024-11-14T16:31:29+00:00",
      "generator": {
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          "version": "4.2.0"
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      "id": "RHSA-2015:0868",
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  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Paolo Bonzini"
          ],
          "organization": "Red Hat",
          "summary": "This issue was discovered by Red Hat."
        }
      ],
      "cve": "CVE-2014-8106",
      "cwe": {
        "id": "CWE-119",
        "name": "Improper Restriction of Operations within the Bounds of a Memory Buffer"
      },
      "discovery_date": "2014-11-13T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1169454"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "It was found that the Cirrus blit region checks were insufficient. A privileged guest user could use this flaw to write outside of VRAM-allocated buffer boundaries in the host\u0027s QEMU process address space with attacker-provided data.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu: cirrus: insufficient blit region checks",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6, a future update may address this flaw.\n\nThis issue affects the kvm packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This issue is currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.",
          "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": [
          "6Server-RHEV-Agents:qemu-img-rhev-2:0.12.1.2-2.448.el6_6.2.x86_64",
          "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.448.el6_6.2.src",
          "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.448.el6_6.2.x86_64",
          "6Server-RHEV-Agents:qemu-kvm-rhev-debuginfo-2:0.12.1.2-2.448.el6_6.2.x86_64",
          "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.448.el6_6.2.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2014-8106"
        },
        {
          "category": "external",
          "summary": "RHBZ#1169454",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1169454"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2014-8106",
          "url": "https://www.cve.org/CVERecord?id=CVE-2014-8106"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2014-8106",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2014-8106"
        }
      ],
      "release_date": "2014-12-04T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2015-04-21T18:00:22+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
          "product_ids": [
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            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-debuginfo-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.448.el6_6.2.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2015:0868"
        }
      ],
      "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"
          },
          "products": [
            "6Server-RHEV-Agents:qemu-img-rhev-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.448.el6_6.2.src",
            "6Server-RHEV-Agents:qemu-kvm-rhev-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-debuginfo-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-RHEV-Agents:qemu-kvm-rhev-tools-2:0.12.1.2-2.448.el6_6.2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "qemu: cirrus: insufficient blit region checks"
    }
  ]
}


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