FKIE_CVE-2021-26343

Vulnerability from fkie_nvd - Published: 2023-01-11 08:15 - Updated: 2026-06-17 03:43
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Summary
Insufficient validation in ASP BIOS and DRTM commands may allow malicious supervisor x86 software to disclose the contents of sensitive memory which may result in information disclosure.
References
psirt@amd.comhttps://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032Vendor Advisory
Impacted products
Vendor Product Version
amd epyc_7003_firmware *
amd epyc_7003 -
amd epyc_72f3_firmware *
amd epyc_72f3 -
amd epyc_7313_firmware *
amd epyc_7313 -
amd epyc_7313p_firmware *
amd epyc_7313p -
amd epyc_7343_firmware *
amd epyc_7343 -
amd epyc_7373x_firmware *
amd epyc_7373x -
amd epyc_73f3_firmware *
amd epyc_73f3 -
amd epyc_7413_firmware *
amd epyc_7413 -
amd epyc_7443_firmware *
amd epyc_7443 -
amd epyc_7443p_firmware *
amd epyc_7443p -
amd epyc_7453_firmware *
amd epyc_7453 -
amd epyc_74f3_firmware *
amd epyc_74f3 -
amd epyc_7513_firmware *
amd epyc_7513 -
amd epyc_7543_firmware *
amd epyc_7543 -
amd epyc_7543p_firmware *
amd epyc_7543p -
amd epyc_7573x_firmware *
amd epyc_7573x -
amd epyc_75f3_firmware *
amd epyc_75f3 -
amd epyc_7643_firmware *
amd epyc_7643 -
amd epyc_7663_firmware *
amd epyc_7663 -
amd epyc_7713_firmware *
amd epyc_7713 -
amd epyc_7713p_firmware *
amd epyc_7713p -
amd epyc_7743_firmware *
amd epyc_7743 -
amd epyc_7763_firmware *
amd epyc_7763 -
amd epyc_7773x_firmware *
amd epyc_7773x -
To clipboard 

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          "packageName": "AGESA",
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          "product": "3rd Gen EPYC",
          "vendor": "AMD",
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              "criteria": "cpe:2.3:h:amd:epyc_7773x:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "D02B1C69-BAA4-485B-BE22-46BE321F9E4E",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Insufficient validation in ASP BIOS and DRTM commands may allow malicious supervisor x86 software to disclose the contents of sensitive memory which may result in information disclosure.\n\n\n"
    },
    {
      "lang": "es",
      "value": "Una validaci\u00f3n insuficiente en los comandos ASP BIOS y DRTM puede permitir que el software supervisor x86 malicioso revele el contenido de la memoria confidencial, lo que puede resultar en la divulgaci\u00f3n de informaci\u00f3n."
    }
  ],
  "id": "CVE-2021-26343",
  "lastModified": "2026-06-17T03:43:11.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-26343",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-04-09T13:24:06.614880Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2023-01-11T08:15:10.503",
  "references": [
    {
      "source": "psirt@amd.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://www.amd.com/en/corporate/product-security/bulletin/AMD-SB-1032"
    }
  ],
  "sourceIdentifier": "psirt@amd.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-668"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}


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Tags
Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

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.