fkie_cve-2025-27840
Vulnerability from fkie_nvd
Published
2025-03-08 20:15
Modified
2025-03-12 14:58
Summary
Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory).
References
cve@mitre.orghttps://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.htmlThird Party Advisory, Technical Description
cve@mitre.orghttps://darkmentor.com/blog/esp32_non-backdoor/Exploit, Third Party Advisory, Technical Description
cve@mitre.orghttps://flyingpenguin.com/?p=67838Third Party Advisory, Technical Description
cve@mitre.orghttps://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdfThird Party Advisory
cve@mitre.orghttps://github.com/em0gi/CVE-2025-27840Product
cve@mitre.orghttps://github.com/esphome/esphome/discussions/8382Issue Tracking
cve@mitre.orghttps://github.com/orgs/espruino/discussions/7699Issue Tracking
cve@mitre.orghttps://news.ycombinator.com/item?id=43301369Issue Tracking
cve@mitre.orghttps://news.ycombinator.com/item?id=43308740Issue Tracking
cve@mitre.orghttps://reg.rootedcon.com/cfp/schedule/talk/5Third Party Advisory
cve@mitre.orghttps://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in-bluetooth-chip-used-by-a-billion-devices/Exploit, Press/Media Coverage
cve@mitre.orghttps://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/Exploit, Press/Media Coverage
cve@mitre.orghttps://www.espressif.com/en/news/Response_ESP32_BluetoothPress/Media Coverage
cve@mitre.orghttps://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/Third Party Advisory
cve@mitre.orghttps://x.com/pascal_gujer/status/1898442439704158276Third Party Advisory
Impacted products
Vendor Product Version
espressif esp32_firmware -
espressif esp32 -



{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:espressif:esp32_firmware:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "C81AEA93-C163-4E5C-A25D-D2903742C9EE",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:espressif:esp32:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "D1024B06-380B-4116-B7F9-A21A03534B0C",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Espressif ESP32 chips allow 29 hidden HCI commands, such as 0xFC02 (Write memory)."
    },
    {
      "lang": "es",
      "value": "Los chips Espressif ESP32 permiten 29 comandos HCI ocultos, como 0xFC02 (Escribir memoria)."
    }
  ],
  "id": "CVE-2025-27840",
  "lastModified": "2025-03-12T14:58:54.130",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "LOW",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 0.3,
        "impactScore": 6.0,
        "source": "cve@mitre.org",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "PHYSICAL",
          "availabilityImpact": "NONE",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:P/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 0.5,
        "impactScore": 5.8,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-03-08T20:15:36.027",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "Technical Description"
      ],
      "url": "https://cheriot.org/auditing/backdoor/2025/03/09/no-esp32-style-backdoor.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory",
        "Technical Description"
      ],
      "url": "https://darkmentor.com/blog/esp32_non-backdoor/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "Technical Description"
      ],
      "url": "https://flyingpenguin.com/?p=67838"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/TarlogicSecurity/Talks/blob/main/2025_RootedCon_BluetoothTools.pdf"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product"
      ],
      "url": "https://github.com/em0gi/CVE-2025-27840"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/esphome/esphome/discussions/8382"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/orgs/espruino/discussions/7699"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://news.ycombinator.com/item?id=43301369"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://news.ycombinator.com/item?id=43308740"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://reg.rootedcon.com/cfp/schedule/talk/5"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Press/Media Coverage"
      ],
      "url": "https://www.bleepingcomputer.com/news/security/undocumented-backdoor-found-in-bluetooth-chip-used-by-a-billion-devices/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Press/Media Coverage"
      ],
      "url": "https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Press/Media Coverage"
      ],
      "url": "https://www.espressif.com/en/news/Response_ESP32_Bluetooth"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://www.tarlogic.com/news/backdoor-esp32-chip-infect-ot-devices/"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://x.com/pascal_gujer/status/1898442439704158276"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-912"
        }
      ],
      "source": "cve@mitre.org",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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