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CVE-2020-16630

Status: ModifiedMedium (6.8)—

TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile. A LTK can be an unauthenticated-and-no-MITM-protection key created by Just Works or an authenticated-and-MITM-protection key created by Passkey Entry, Numeric Comparison or OOB. Assume that a victim mobile uses secure pairing to pair with a victim BLE device based on TI chips and generate an authenticated-and-MITM-protection LTK. If a fake mobile with the victim mobile’s MAC address uses Just Works and pairs with the victim device, the generated LTK still has the property of authenticated-and-MITM-protection. Therefore, the fake mobile can access attributes with the authenticated read/write permission.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (7)

TI — 15.4-stackTI — Ble5-stackTI — Dynamic Multi-protocal ManagerTI — EasylinkTI — OpenthreadTI — Real-time Operating SystemTI — Z-stack

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-16630",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 4.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 5.5,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.8,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.2,
        "exploitabilityScore": 1.6
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-09-20T20:15:11.337",
  "references": [
    {
      "url": "http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.usenix.org/system/files/sec20-zhang-yue.pdf",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://software-dl.ti.com/simplelink/esd/simplelink_cc13x2_26x2_sdk/3.20.00.68/exports/changelog.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.usenix.org/system/files/sec20-zhang-yue.pdf",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "TI’s BLE stack caches and reuses the LTK’s property for a bonded mobile. A LTK can be an unauthenticated-and-no-MITM-protection key created by Just Works or an authenticated-and-MITM-protection key created by Passkey Entry, Numeric Comparison or OOB. Assume that a victim mobile uses secure pairing to pair with a victim BLE device based on TI chips and generate an authenticated-and-MITM-protection LTK. If a fake mobile with the victim mobile’s MAC address uses Just Works and pairs with the victim device, the generated LTK still has the property of authenticated-and-MITM-protection. Therefore, the fake mobile can access attributes with the authenticated read/write permission."
    },
    {
      "lang": "es",
      "value": "La pila BLE de TI almacena en caché y reusa la propiedad del LTK para un móvil vinculado. Una LTK puede ser una clave no autenticada y sin protección MITM creada por Just Works o una clave autenticada y con protección MITM creada por Passkey Entry, Numeric Comparison u OOB. Supongamos que un móvil víctima usa el emparejamiento seguro para emparejarse con un dispositivo BLE víctima basado en chips TI y genera una LTK autenticada y de protección MITM. Si un móvil falso con la dirección MAC del móvil víctima usa Just Works y se empareja con el dispositivo víctima, el LTK generado sigue teniendo la propiedad de autenticación y protección MITM. Por lo tanto, el móvil falso puede acceder a los atributos con el permiso de lectura/escritura autenticado"
    }
  ],
  "lastModified": "2026-06-17T02:58:04.477",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ti:15.4-stack:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F2973A2C-67E6-4064-A2A9-E4122E201DDF"
            },
            {
              "criteria": "cpe:2.3:a:ti:ble5-stack:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0E161F37-86D3-4558-91B4-086528A351AA"
            },
            {
              "criteria": "cpe:2.3:a:ti:dynamic_multi-protocal_manager:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F9951BB2-E930-4C92-B673-501591679002"
            },
            {
              "criteria": "cpe:2.3:a:ti:easylink:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "74934E63-1140-4F9B-BC05-3739E62B9DE4"
            },
            {
              "criteria": "cpe:2.3:a:ti:openthread:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B3586ABB-3E4A-4BAD-B9F4-5EB6775AFEF3"
            },
            {
              "criteria": "cpe:2.3:a:ti:z-stack:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "BA516494-4D9A-4275-A7BA-A82699625477"
            },
            {
              "criteria": "cpe:2.3:o:ti:real-time_operating_system:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E289611E-871B-433E-BF10-CDABF650AAC9"
            }
          ],
          "operator": "OR"
        }
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    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}