FKIE_CVE-2020-11684

Vulnerability from fkie_nvd - Published: 2020-09-14 14:15 - Updated: 2026-06-17 02:50
Severity
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader).
References
cve@mitre.orghttps://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927Patch, Third Party Advisory
cve@mitre.orghttps://labs.f-secure.com/advisories/microchip-at91bootstrap/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://labs.f-secure.com/advisories/microchip-at91bootstrap/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
linux4sam at91bootstrap *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:linux4sam:at91bootstrap:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "DD93186D-51E5-4F8C-B833-D1931B06F370",
              "versionEndExcluding": "3.9.2",
              "versionStartIncluding": "3.7.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "AT91bootstrap before 3.9.2 does not properly wipe encryption and authentication keys from memory before passing control to a less privileged software component. This can be exploited to disclose these keys and subsequently encrypt and sign the next boot stage (such as the bootloader)."
    },
    {
      "lang": "es",
      "value": "AT91bootstrap versiones anteriores a 3.9.2, no limpia apropiadamente las claves de cifrado y autenticaci\u00f3n de la memoria antes de pasar el control a un componente de software menos privilegiado.\u0026#xa0;Esto puede ser explotado para revelar estas claves y posteriormente cifrar y firmar la siguiente etapa de arranque (tal y como el cargador de arranque)"
    }
  ],
  "id": "CVE-2020-11684",
  "lastModified": "2026-06-17T02:50:36.750",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "PARTIAL",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 4.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-09-14T14:15:10.680",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://labs.f-secure.com/advisories/microchip-at91bootstrap/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "https://github.com/linux4sam/at91bootstrap/commit/45419497309ffbf27c17ea7938499aca99168927"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://labs.f-secure.com/advisories/microchip-at91bootstrap/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-212"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • 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.