GSD-2021-26311

Vulnerability from gsd - Updated: 2023-12-13 01:23
Details
In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.
Aliases
Aliases

{
  "GSD": {
    "alias": "CVE-2021-26311",
    "description": "In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.",
    "id": "GSD-2021-26311",
    "references": [
      "https://www.suse.com/security/cve/CVE-2021-26311.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-26311"
      ],
      "details": "In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor.",
      "id": "GSD-2021-26311",
      "modified": "2023-12-13T01:23:33.511094Z",
      "schema_version": "1.4.0"
    }
  },
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        "DATE_PUBLIC": "2021-05-11T18:43:00.000Z",
        "ID": "CVE-2021-26311",
        "STATE": "PUBLIC",
        "TITLE": "AMD Secure Encrypted Virtualization"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "SEV/SEV-ES",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_value": "SEV-SNP"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "AMD"
            }
          ]
        }
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          }
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                "value": "Arbitrary Code Execution"
              }
            ]
          }
        ]
      },
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            "name": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1004",
            "refsource": "MISC",
            "url": "https://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1004"
          }
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      },
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        "discovery": "EXTERNAL"
      }
    },
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          "ASSIGNER": "psirt@amd.com",
          "ID": "CVE-2021-26311"
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        "data_type": "CVE",
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              "lang": "en",
              "value": "In the AMD SEV/SEV-ES feature, memory can be rearranged in the guest address space that is not detected by the attestation mechanism which could be used by a malicious hypervisor to potentially lead to arbitrary code execution within the guest VM if a malicious administrator has access to compromise the server hypervisor."
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      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "SINGLE",
            "availabilityImpact": "COMPLETE",
            "baseScore": 9.0,
            "confidentialityImpact": "COMPLETE",
            "integrityImpact": "COMPLETE",
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C",
            "version": "2.0"
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          "obtainAllPrivilege": false,
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          "obtainUserPrivilege": false,
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          "userInteractionRequired": false
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "exploitabilityScore": 1.2,
          "impactScore": 5.9
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      },
      "lastModifiedDate": "2021-05-25T14:49Z",
      "publishedDate": "2021-05-13T12:15Z"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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