gsd-2020-2732
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
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.
Aliases
Aliases
CVE-2020-2732


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-2732",
    "description": "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.",
    "id": "GSD-2020-2732",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-2732.html",
      "https://www.debian.org/security/2020/dsa-4698",
      "https://www.debian.org/security/2020/dsa-4667",
      "https://access.redhat.com/errata/RHSA-2020:4062",
      "https://access.redhat.com/errata/RHSA-2020:4060",
      "https://access.redhat.com/errata/RHSA-2020:2171",
      "https://access.redhat.com/errata/RHSA-2020:2102",
      "https://ubuntu.com/security/CVE-2020-2732",
      "https://advisories.mageia.org/CVE-2020-2732.html",
      "https://security.archlinux.org/CVE-2020-2732",
      "https://alas.aws.amazon.com/cve/html/CVE-2020-2732.html",
      "https://linux.oracle.com/cve/CVE-2020-2732.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-2732"
      ],
      "details": "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.",
      "id": "GSD-2020-2732",
      "modified": "2023-12-13T01:21:50.500721Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "secalert_us@oracle.com",
        "ID": "CVE-2020-2732",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Oracle Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "=",
                          "version_value": "7"
                        },
                        {
                          "version_affected": "=",
                          "version_value": "6"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Oracle Corporation"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "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."
          }
        ]
      },
      "impact": {
        "cvss": {
          "baseScore": "5.8",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        }
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "Difficult to exploit vulnerability allows low privileged attacker with network access via multiple protocols to compromise Linux server.  Successful attacks of this vulnerability can result in authorized ability to cause a hang or frequently repeatable crash (complete DOS) of Linux Server."
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://www.openwall.com/lists/oss-security/2020/02/25/3",
            "refsource": "MISC",
            "url": "https://www.openwall.com/lists/oss-security/2020/02/25/3"
          },
          {
            "name": "https://www.spinics.net/lists/kvm/msg208259.html",
            "refsource": "MISC",
            "url": "https://www.spinics.net/lists/kvm/msg208259.html"
          },
          {
            "name": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec",
            "refsource": "MISC",
            "url": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec"
          },
          {
            "name": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c",
            "refsource": "MISC",
            "url": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c"
          },
          {
            "name": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d",
            "refsource": "MISC",
            "url": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d"
          },
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135",
            "refsource": "MISC",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"
          },
          {
            "name": "https://linux.oracle.com/errata/ELSA-2020-5540.html",
            "refsource": "MISC",
            "url": "https://linux.oracle.com/errata/ELSA-2020-5540.html"
          },
          {
            "name": "https://linux.oracle.com/errata/ELSA-2020-5542.html",
            "refsource": "MISC",
            "url": "https://linux.oracle.com/errata/ELSA-2020-5542.html"
          },
          {
            "name": "https://linux.oracle.com/errata/ELSA-2020-5543.html",
            "refsource": "MISC",
            "url": "https://linux.oracle.com/errata/ELSA-2020-5543.html"
          },
          {
            "name": "DSA-4667",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2020/dsa-4667"
          },
          {
            "name": "[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"
          },
          {
            "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"
          },
          {
            "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update",
            "refsource": "MLIST",
            "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"
          },
          {
            "name": "DSA-4698",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2020/dsa-4698"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*",
                "cpe_name": [],
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "secalert_us@oracle.com",
          "ID": "CVE-2020-2732"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-200"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.spinics.net/lists/kvm/msg208259.html",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://www.spinics.net/lists/kvm/msg208259.html"
            },
            {
              "name": "https://linux.oracle.com/errata/ELSA-2020-5540.html",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://linux.oracle.com/errata/ELSA-2020-5540.html"
            },
            {
              "name": "https://linux.oracle.com/errata/ELSA-2020-5542.html",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://linux.oracle.com/errata/ELSA-2020-5542.html"
            },
            {
              "name": "https://www.openwall.com/lists/oss-security/2020/02/25/3",
              "refsource": "MISC",
              "tags": [
                "Mailing List",
                "Third Party Advisory"
              ],
              "url": "https://www.openwall.com/lists/oss-security/2020/02/25/3"
            },
            {
              "name": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://git.kernel.org/linus/35a571346a94fb93b5b3b6a599675ef3384bc75c"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135",
              "refsource": "MISC",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1805135"
            },
            {
              "name": "https://linux.oracle.com/errata/ELSA-2020-5543.html",
              "refsource": "MISC",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://linux.oracle.com/errata/ELSA-2020-5543.html"
            },
            {
              "name": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://git.kernel.org/linus/07721feee46b4b248402133228235318199b05ec"
            },
            {
              "name": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d",
              "refsource": "MISC",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "https://git.kernel.org/linus/e71237d3ff1abf9f3388337cfebf53b96df2020d"
            },
            {
              "name": "DSA-4667",
              "refsource": "DEBIAN",
              "tags": [],
              "url": "https://www.debian.org/security/2020/dsa-4667"
            },
            {
              "name": "[debian-lts-announce] 20200609 [SECURITY] [DLA 2241-1] linux security update",
              "refsource": "MLIST",
              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html"
            },
            {
              "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2241-2] linux security update",
              "refsource": "MLIST",
              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html"
            },
            {
              "name": "[debian-lts-announce] 20200610 [SECURITY] [DLA 2242-1] linux-4.9 security update",
              "refsource": "MLIST",
              "tags": [],
              "url": "https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html"
            },
            {
              "name": "DSA-4698",
              "refsource": "DEBIAN",
              "tags": [],
              "url": "https://www.debian.org/security/2020/dsa-4698"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "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,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2020-06-10T20:15Z",
      "publishedDate": "2020-04-08T22:15Z"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.