rhsa-2016_0084
Vulnerability from csaf_redhat
Published
2016-01-28 15:56
Modified
2024-11-14 19:00
Summary
Red Hat Security Advisory: qemu-kvm-rhev security and bug fix update

Notes

Topic
Updated qemu-kvm-rhev packages that fix two security issues and three bugs are now available for Red Hat Enterprise Virtualization. Red Hat Product Security 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. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM. A use-after-free flaw was found in the way QEMU's IDE AHCI emulator processed certain AHCI Native Command Queuing (NCQ) AIO commands. A privileged guest user could use this flaw to crash the QEMU process instance or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-1568) An out-of-bounds read/write flaw was discovered in the way QEMU's Firmware Configuration device emulation processed certain firmware configurations. A privileged (CAP_SYS_RAWIO) guest user could use this flaw to crash the QEMU process instance or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2016-1714) Red Hat would like to thank Qinghao Tang of Qihoo 360 Marvel Team for reporting the CVE-2016-1568 issue, and Donghai Zhu of Alibaba for reporting the CVE-2016-1714 issue. This update also fixes the following bugs: * Incorrect handling of the last sector of an image file could trigger an assertion failure in qemu-img. This update changes the handling of the last sector, and no assertion failure occurs. (BZ#1299345) * Previously, rebooting a guest after multiple memory hot-plugs in some cases caused the qemu-kvm process to terminate unexpectedly, and the reboot to fail. This update fixes the problem, and guests with hot-plugged memory reboot successfully. (BZ#1288096) * When the OHCI driver received an interrupt during the suspending process, the interrupt was not acknowledged. As a consequence, the interrupt kept being sent repeatedly, and the system became unresponsive. This update modifies the suspend procedure to acknowledge the interrupt, which prevents the described problem. (BZ#1298971) All qemu-kvm-rhev users are advised to upgrade to these updated packages, which contain backported patches to correct these issues. 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-rhev packages that fix two security issues and three bugs\nare now available for Red Hat Enterprise Virtualization.\n\nRed Hat Product Security has rated this update as having Important security\nimpact. Common Vulnerability Scoring System (CVSS) base scores, which give\ndetailed severity ratings, are available for each vulnerability from the\nCVE 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. The qemu-kvm-rhev package provides the\nuser-space component for running virtual machines using KVM.\n\nA use-after-free flaw was found in the way QEMU\u0027s IDE AHCI emulator\nprocessed certain AHCI Native Command Queuing (NCQ) AIO commands.\nA privileged guest user could use this flaw to crash the QEMU process\ninstance or, potentially, execute arbitrary code on the host with\nprivileges of the QEMU process. (CVE-2016-1568)\n\nAn out-of-bounds read/write flaw was discovered in the way QEMU\u0027s Firmware\nConfiguration device emulation processed certain firmware configurations.\nA privileged (CAP_SYS_RAWIO) guest user could use this flaw to crash the\nQEMU process instance or, potentially, execute arbitrary code on the host\nwith privileges of the QEMU process. (CVE-2016-1714)\n\nRed Hat would like to thank Qinghao Tang of Qihoo 360 Marvel Team for\nreporting the CVE-2016-1568 issue, and Donghai Zhu of Alibaba for reporting\nthe CVE-2016-1714 issue.\n\nThis update also fixes the following bugs:\n\n* Incorrect handling of the last sector of an image file could trigger an\nassertion failure in qemu-img. This update changes the handling of the last\nsector, and no assertion failure occurs. (BZ#1299345)\n\n* Previously, rebooting a guest after multiple memory hot-plugs in some\ncases caused the qemu-kvm process to terminate unexpectedly, and the reboot\nto fail. This update fixes the problem, and guests with hot-plugged memory\nreboot successfully. (BZ#1288096)\n\n* When the OHCI driver received an interrupt during the suspending process,\nthe interrupt was not acknowledged. As a consequence, the interrupt kept\nbeing sent repeatedly, and the system became unresponsive. This update\nmodifies the suspend procedure to acknowledge the interrupt, which prevents\nthe described problem. (BZ#1298971)\n\nAll qemu-kvm-rhev users are advised to upgrade to these updated packages,\nwhich contain backported patches to correct these issues. After installing\nthis update, shut down all running virtual machines. Once all virtual\nmachines have shut down, start them again for this update to take effect.",
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            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.src",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Power-Agents:libcacard-devel-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:libcacard-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:libcacard-tools-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-img-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.src",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.7.ppc64le"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2016:0084"
        }
      ],
      "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": [
            "7Server-RHEV-Agents-7:libcacard-devel-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:libcacard-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:libcacard-tools-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-img-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.src",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.7.x86_64",
            "7Server-RHEV-Power-Agents:libcacard-devel-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:libcacard-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:libcacard-tools-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-img-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-10:2.3.0-31.el7_2.7.src",
            "7Server-RHEV-Power-Agents:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.7.ppc64le",
            "7Server-RHEV-Power-Agents:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.7.ppc64le"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "Qemu: nvram: OOB r/w access in processing firmware configurations"
    }
  ]
}


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