rhsa-2015_0867
Vulnerability from csaf_redhat
Published
2015-04-21 18:00
Modified
2024-11-14 16:31
Summary
Red Hat Security Advisory: qemu-kvm security and bug fix update

Notes

Topic
An updated qemu-kvm package that fixes one security issue and one bug is now available for Red Hat Enterprise Linux 6. 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 package provides the user-space component for running virtual machines using KVM. 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 found 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 qemu-kvm users 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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        "text": "An updated qemu-kvm package that fixes one security issue and one bug is\nnow available for Red Hat Enterprise Linux 6.\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.",
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            "6Server-6.6.z:qemu-kvm-debuginfo-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Server-6.6.z:qemu-kvm-tools-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Workstation-6.6.z:qemu-guest-agent-2:0.12.1.2-2.448.el6_6.2.i686",
            "6Workstation-6.6.z:qemu-guest-agent-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Workstation-6.6.z:qemu-img-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Workstation-6.6.z:qemu-kvm-2:0.12.1.2-2.448.el6_6.2.src",
            "6Workstation-6.6.z:qemu-kvm-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Workstation-6.6.z:qemu-kvm-debuginfo-2:0.12.1.2-2.448.el6_6.2.i686",
            "6Workstation-6.6.z:qemu-kvm-debuginfo-2:0.12.1.2-2.448.el6_6.2.x86_64",
            "6Workstation-6.6.z:qemu-kvm-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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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.