fkie_cve-2020-2732
Vulnerability from fkie_nvd
Published
2020-04-08 22:15
Modified
2024-11-21 05:26
Severity ?
5.8 (Medium) - CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
6.8 (Medium) - CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Summary
A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest.
References
secalert_us@oracle.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
secalert_us@oracle.comhttps://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
secalert_us@oracle.comhttps://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
secalert_us@oracle.comhttps://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
secalert_us@oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
secalert_us@oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
secalert_us@oracle.comhttps://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
secalert_us@oracle.comhttps://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
secalert_us@oracle.comhttps://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
secalert_us@oracle.comhttps://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
secalert_us@oracle.comhttps://www.debian.org/security/2020/dsa-4667
secalert_us@oracle.comhttps://www.debian.org/security/2020/dsa-4698
secalert_us@oracle.comhttps://www.openwall.com/lists/oss-security/2020/02/25/3Mailing List, Third Party Advisory
secalert_us@oracle.comhttps://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1805135Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ecPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75cPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020dPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://linux.oracle.com/errata/ELSA-2020-5540.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://linux.oracle.com/errata/ELSA-2020-5542.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://linux.oracle.com/errata/ELSA-2020-5543.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2020/dsa-4667
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2020/dsa-4698
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2020/02/25/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.spinics.net/lists/kvm/msg208259.htmlPatch, Third Party Advisory
Impacted products
Vendor Product Version
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was discovered in the way that the KVM hypervisor handled instruction emulation for an L2 guest when nested virtualisation is enabled. Under some circumstances, an L2 guest may trick the L0 guest into accessing sensitive L1 resources that should be inaccessible to the L2 guest."
    },
    {
      "lang": "es",
      "value": "Se detect\u00f3 un fallo en la manera en que el hipervisor de KVM manej\u00f3 la emulaci\u00f3n de instrucciones para un invitado L2 cuando la virtualizaci\u00f3n anidada est\u00e1 habilitada. En algunas circunstancias, un invitado L2 puede enga\u00f1ar al invitado L0 para que acceda a recursos L1 confidenciales que deber\u00edan estar inaccesibles para el invitado L2."
    }
  ],
  "id": "CVE-2020-2732",
  "lastModified": "2024-11-21T05:26:06.910",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "ADJACENT_NETWORK",
          "authentication": "SINGLE",
          "availabilityImpact": "NONE",
          "baseScore": 2.3,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:A/AC:M/Au:S/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 4.4,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 4.0,
        "source": "secalert_us@oracle.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "ADJACENT_NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 4.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-04-08T22:15:12.263",
  "references": [
    {
      "source": "secalert_us@oracle.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"
    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
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      ],
      "url": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec"
    },
    {
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    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
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      ],
      "url": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d"
    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
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      ],
      "url": "https://linux.oracle.com/errata/ELSA-2020-5540.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://linux.oracle.com/errata/ELSA-2020-5542.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://linux.oracle.com/errata/ELSA-2020-5543.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"
    },
    {
      "source": "secalert_us@oracle.com",
      "url": "https://www.debian.org/security/2020/dsa-4667"
    },
    {
      "source": "secalert_us@oracle.com",
      "url": "https://www.debian.org/security/2020/dsa-4698"
    },
    {
      "source": "secalert_us@oracle.com",
      "tags": [
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      "url": "https://www.openwall.com/lists/oss-security/2020/02/25/3"
    },
    {
      "source": "secalert_us@oracle.com",
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      ],
      "url": "https://www.spinics.net/lists/kvm/msg208259.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
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      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://www.spinics.net/lists/kvm/msg208259.html"
    }
  ],
  "sourceIdentifier": "secalert_us@oracle.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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