rhsa-2018_0816
Vulnerability from csaf_redhat
Published
2018-04-10 08:47
Modified
2024-11-05 20:27
Summary
Red Hat Security Advisory: qemu-kvm security, bug fix, and enhancement update

Notes

Topic
An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Low. 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
Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Security Fix(es): * Qemu: vga: OOB read access during display update (CVE-2017-13672) * 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; Wjjzhang (Tencent.com) for reporting CVE-2017-13711; and Jiang Xin and Lin ZheCheng for reporting CVE-2018-5683. The CVE-2017-15124 issue was discovered by Daniel Berrange (Red Hat). Additional Changes: For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 Release Notes linked from the References section.
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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            "vectorString": "AV:N/AC:H/Au:S/C:N/I:N/A:P",
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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 3.0,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
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            "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",
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      ],
      "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": {
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      "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": "2018-04-10T08:47:03+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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            "integrityImpact": "NONE",
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            "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"
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      "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.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • 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.