FKIE_CVE-2021-46795

Vulnerability from fkie_nvd - Published: 2023-01-11 08:15 - Updated: 2025-04-09 15:15
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service.
References
psirt@amd.comhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031Vendor Advisory
Impacted products
Vendor Product Version
amd comboam4v2_pi_firmware *
amd comboam4v2_pi -
amd renoirpi-fp6_firmware *
amd comboam4v2_pi -
amd cezannepi-fp6_firmware *
amd cezannepi-fp6 -
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:amd:comboam4v2_pi_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D075A02-6278-43AB-8108-66DBA2FA3F50",
              "versionEndExcluding": "1.2.0.5",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "DAC265C7-A9A3-4156-9AB3-8F975AED6764",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:amd:renoirpi-fp6_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0E0B55C4-452F-42AD-B00F-4A61CEED1337",
              "versionEndExcluding": "1.0.0.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:amd:comboam4v2_pi:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "DAC265C7-A9A3-4156-9AB3-8F975AED6764",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:amd:cezannepi-fp6_firmware:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5CEF152D-7D7D-4632-BCDA-FA46A8D8AA12",
              "versionEndExcluding": "1.0.0.6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:amd:cezannepi-fp6:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "DBE05F55-E039-486A-B3E0-E1CC3BF81049",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A TOCTOU (time-of-check to time-of-use) vulnerability exists where an attacker may use a compromised BIOS to cause the TEE OS to read memory out of bounds that could potentially result in a denial of service."
    },
    {
      "lang": "es",
      "value": "Existe una vulnerabilidad TOCTOU (time-of-check to time-of-use) donde un atacante puede usar un BIOS comprometido para hacer que TEE OS lea la memoria fuera de los l\u00edmites, lo que potencialmente podr\u00eda resultar en una denegaci\u00f3n de servicio."
    }
  ],
  "id": "CVE-2021-46795",
  "lastModified": "2025-04-09T15:15:45.247",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.0,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2023-01-11T08:15:13.347",
  "references": [
    {
      "source": "psirt@amd.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1031"
    }
  ],
  "sourceIdentifier": "psirt@amd.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-367"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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 observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.