rhsa-2018_1104
Vulnerability from csaf_redhat
Published
2018-04-10 18:54
Modified
2024-11-05 20:28
Summary
Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update

Notes

Topic
An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. 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 a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. The following packages have been upgraded to a later upstream version: qemu-kvm-rhev (2.10.0). (BZ#1470749) Security Fix(es): * Qemu: stack buffer overflow in NBD server triggered via long export name (CVE-2017-15118) * Qemu: DoS via large option request (CVE-2017-15119) * Qemu: vga: OOB read access during display update (CVE-2017-13672) * Qemu: vga: reachable assert failure during display update (CVE-2017-13673) * Qemu: Slirp: use-after-free when sending response (CVE-2017-13711) * Qemu: memory exhaustion through framebuffer update request message in VNC server (CVE-2017-15124) * Qemu: I/O: potential memory exhaustion via websock connection to VNC (CVE-2017-15268) * Qemu: Out-of-bounds read in vga_draw_text routine (CVE-2018-5683) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank David Buchanan for reporting CVE-2017-13672 and CVE-2017-13673; Wjjzhang (Tencent.com) for reporting CVE-2017-13711; and Jiang Xin and Lin ZheCheng for reporting CVE-2018-5683. The CVE-2017-15118 and CVE-2017-15119 issues were discovered by Eric Blake (Red Hat) and the CVE-2017-15124 issue was discovered by Daniel Berrange (Red Hat).
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 update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7.\n\nRed Hat Product Security has rated this update as having a security impact of Important. 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.",
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            "baseScore": 3.0,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
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      ],
      "threats": [
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          "category": "impact",
          "details": "Low"
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      ],
      "title": "QEMU: vga: OOB read access during display update"
    },
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      "acknowledgments": [
        {
          "names": [
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          ]
        }
      ],
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        "id": "CWE-617",
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        {
          "category": "description",
          "text": "An assert failure issue was found in the VGA display emulator built into the Quick emulator (QEMU). It could occur while updating graphics display, due to miscalculating region for dirty bitmap snapshot in split screen mode. A privileged user/process inside guest could use this flaw to crash the QEMU process on the host resulting in denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: VGA: reachable assert failure during display update",
          "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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          "category": "self",
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          "category": "external",
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      "acknowledgments": [
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          "names": [
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          "organization": "Tencent.com"
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          "title": "Vulnerability description"
        },
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          "text": "QEMU: Slirp: use-after-free when sending response",
          "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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          "text": "A stack-based buffer overflow vulnerability was found in NBD server implementation in qemu allowing a client to request an export name of size up to 4096 bytes, which in fact should be limited to 256 bytes, allowing causing an out-of-bounds stack write in the qemu process. If NBD server requires TLS, the attacker cannot trigger the buffer overflow without first successfully negotiating TLS.",
          "title": "Vulnerability description"
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          "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.",
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          "details": "Important"
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      "acknowledgments": [
        {
          "names": [
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          "organization": "Red Hat",
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "qemu: DoS via large option request",
          "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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      "title": "qemu: DoS via large option request"
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        {
          "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.",
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          "title": "Vulnerability description"
        },
        {
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          "title": "Vulnerability summary"
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        {
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2017-15268"
        },
        {
          "category": "external",
          "summary": "RHBZ#1496879",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1496879"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2017-15268",
          "url": "https://www.cve.org/CVERecord?id=CVE-2017-15268"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2017-15268",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2017-15268"
        }
      ],
      "release_date": "2017-09-22T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-04-10T18:54:38+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-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.x86_64",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1104"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "HIGH",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 2.1,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:H/Au:S/C:N/I:N/A:P",
            "version": "2.0"
          },
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.0,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.0"
          },
          "products": [
            "7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.10.0-21.el7.ppc64le",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "QEMU: I/O: potential memory exhaustion via websock connection to VNC"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Jiang Xin",
            "Lin ZheCheng"
          ]
        }
      ],
      "cve": "CVE-2018-5683",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2017-12-28T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1530356"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An out-of-bounds read access issue was found in the VGA emulator of QEMU. It could occur in vga_draw_text routine, while updating display area for a vnc client. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "Qemu: Out-of-bounds read in vga_draw_text routine",
          "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": [
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          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.ppc64le",
          "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2018-5683"
        },
        {
          "category": "external",
          "summary": "RHBZ#1530356",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1530356"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2018-5683",
          "url": "https://www.cve.org/CVERecord?id=CVE-2018-5683"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2018-5683",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2018-5683"
        }
      ],
      "release_date": "2017-12-25T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2018-04-10T18:54:38+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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            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.x86_64",
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            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2018:1104"
        }
      ],
      "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": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.0,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.0"
          },
          "products": [
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            "7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.src",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.10.0-21.el7.x86_64",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.ppc64le",
            "7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.10.0-21.el7.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "Qemu: Out-of-bounds read in vga_draw_text routine"
    }
  ]
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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