{
  "id": "CVE-2015-2756",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2015-04-01T14:59:08.757",
  "lastModified": "2018-10-30T16:26:53.700",
  "vulnStatus": "Modified",
  "descriptions": [
    {
      "lang": "en",
      "value": "QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response."
    },
    {
      "lang": "es",
      "value": "QEMU, utilizado en Xen 3.3.x hasta 4.5.x, no restringe correctamente el acceso a los registros de comandos PCI, lo que podr\u00eda permitir a usuarios locales invitados de HVM causar una denegaci\u00f3n de servicio (non-maskable interrupt (NMI) y ca\u00edda de anfitri\u00f3n) mediante la deshabilitaci\u00f3n de (1) la memoria o (2) la decodificaci\u00f3n I/O para un dispositivo PCI Express y posteriormente accediendo al dispositivo, lo que provoca una respuesta Unsupported Request (UR)."
    }
  ],
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        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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      "type": "Primary",
      "description": [
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          "lang": "en",
          "value": "CWE-264"
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  "references": [
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html",
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    },
    {
      "url": "http://support.citrix.com/article/CTX201145",
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      "url": "http://www.debian.org/security/2015/dsa-3259",
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    {
      "url": "http://www.securityfocus.com/bid/72577",
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    {
      "url": "http://www.securitytracker.com/id/1031998",
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    {
      "url": "http://www.ubuntu.com/usn/USN-2608-1",
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      "tags": [
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    {
      "url": "https://security.gentoo.org/glsa/201504-04",
      "source": "cve@mitre.org"
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      "url": "https://support.citrix.com/article/CTX206006",
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}