rhsa-2016:1756
Vulnerability from csaf_redhat
Published
2016-08-24 05:09
Modified
2025-11-08 04:15
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 OpenStack Platform 8.0 (Liberty). 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 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. Security Fix(es): * Quick Emulator(QEMU) built with the Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap-based buffer overflow issue. The flaw could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside a guest could exploit this flaw to crash the QEMU process resulting in denial of service, or potentially leverage it to execute arbitrary code with QEMU-process privileges on the host. (CVE-2016-5126) * Quick Emulator(QEMU) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement results in unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403) Red Hat would like to thank hongzhenhao (Marvel Team) for reporting CVE-2016-5403.
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": "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.\n\nSecurity Fix(es):\n\n* Quick Emulator(QEMU) built with the Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap-based buffer overflow issue. The flaw could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside a guest could exploit this flaw to crash the QEMU process resulting in denial of service, or potentially leverage it to execute arbitrary code with QEMU-process privileges on the host. (CVE-2016-5126)\n\n* Quick Emulator(QEMU) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement results in unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403)\n\nRed Hat would like to thank hongzhenhao (Marvel Team) for reporting CVE-2016-5403.",
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  "vulnerabilities": [
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      "cwe": {
        "id": "CWE-120",
        "name": "Buffer Copy without Checking Size of Input (\u0027Classic Buffer Overflow\u0027)"
      },
      "discovery_date": "2016-05-30T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1340924"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Quick Emulator(QEMU) built with the Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap-based buffer overflow issue. The flaw could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside a guest could exploit this flaw to crash the QEMU process resulting in denial of service, or potentially leverage it to execute arbitrary code with QEMU-process privileges on the host.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: block: iscsi: buffer overflow in iscsi_aio_ioctl",
          "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"
        }
      ],
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2016-5126"
        },
        {
          "category": "external",
          "summary": "RHBZ#1340924",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1340924"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2016-5126",
          "url": "https://www.cve.org/CVERecord?id=CVE-2016-5126"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-5126",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-5126"
        }
      ],
      "release_date": "2016-05-24T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-24T05:09:40+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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        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 4.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:M/Au:N/C:N/I:P/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L",
            "version": "3.0"
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            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.21.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Qemu: block: iscsi: buffer overflow in iscsi_aio_ioctl"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "hongzhenhao"
          ],
          "organization": "Marvel Team"
        }
      ],
      "cve": "CVE-2016-5403",
      "discovery_date": "2016-07-20T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1358359"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "Quick Emulator (QEMU) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement results in unbounded memory allocation on the host controlled by the guest.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: virtio: unbounded memory allocation on host via guest leading to DoS",
          "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": [
          "7Server-RH7-RHOS-8.0:libcacard-rhev-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:libcacard-tools-rhev-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:qemu-img-rhev-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.src",
          "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.21.x86_64",
          "7Server-RH7-RHOS-8.0:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.21.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2016-5403"
        },
        {
          "category": "external",
          "summary": "RHBZ#1358359",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1358359"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2016-5403",
          "url": "https://www.cve.org/CVERecord?id=CVE-2016-5403"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-5403",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-5403"
        }
      ],
      "release_date": "2016-07-27T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2016-08-24T05:09:40+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-RH7-RHOS-8.0:libcacard-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:libcacard-tools-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-img-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.src",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.21.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2016:1756"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "MEDIUM",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:A/AC:M/Au:S/C:N/I:N/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.4,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.0"
          },
          "products": [
            "7Server-RH7-RHOS-8.0:libcacard-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:libcacard-tools-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-img-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-common-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.src",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-rhev-debuginfo-10:2.3.0-31.el7_2.21.x86_64",
            "7Server-RH7-RHOS-8.0:qemu-kvm-tools-rhev-10:2.3.0-31.el7_2.21.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "Qemu: virtio: unbounded memory allocation on host via guest leading to DoS"
    }
  ]
}


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