gsd-2018-10901
Vulnerability from gsd
Modified
2023-12-13 01:22
Details
A flaw was found in Linux kernel's KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host's userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.
Aliases
Aliases
CVE-2018-10901


To clipboard 

{
  "GSD": {
    "alias": "CVE-2018-10901",
    "description": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.",
    "id": "GSD-2018-10901",
    "references": [
      "https://www.suse.com/security/cve/CVE-2018-10901.html",
      "https://access.redhat.com/errata/RHSA-2018:2394",
      "https://access.redhat.com/errata/RHSA-2018:2393",
      "https://access.redhat.com/errata/RHSA-2018:2392",
      "https://access.redhat.com/errata/RHSA-2018:2391",
      "https://access.redhat.com/errata/RHSA-2018:2390",
      "https://alas.aws.amazon.com/cve/html/CVE-2018-10901.html",
      "https://linux.oracle.com/cve/CVE-2018-10901.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2018-10901"
      ],
      "details": "A flaw was found in Linux kernel\u0027s KVM virtualization subsystem. The VMX code does not restore the GDT.LIMIT to the previous host value, but instead sets it to 64KB. With a corrupted GDT limit a host\u0027s userspace code has an ability to place malicious entries in the GDT, particularly to the per-cpu variables. An attacker can use this to escalate their privileges.",
      "id": "GSD-2018-10901",
      "modified": "2023-12-13T01:22:41.017401Z",
      "schema_version": "1.4.0"
    }
  },
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          }
        ]
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          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
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      },
      "impact": {
        "baseMetricV2": {
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "LOCAL",
            "authentication": "NONE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 7.2,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
            "version": "2.0"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 10.0,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "HIGH",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 1.8,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2023-02-24T18:43Z",
      "publishedDate": "2018-07-26T17:29Z"
    }
  }
}


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