FKIE_CVE-2021-21969

Vulnerability from fkie_nvd - Published: 2022-02-04 23:15 - Updated: 2026-06-17 03:36
Severity
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
An out-of-bounds write vulnerability exists in the HandleSeaCloudMessage functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. The HandleIncomingSeaCloudMessage function uses at [4] the json_object_get_string to populate the p_payload global variable. The p_payload is only 0x100 bytes long, and the total MQTT message could be up to 0x201 bytes. Because the function json_object_get_string will fill str based on the length of the json’s value and not the actual str size, this would result in a possible out-of-bounds write.
References
talos-cna@cisco.comhttps://talosintelligence.com/vulnerability_reports/TALOS-2021-1396Exploit, Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396Exploit, Technical Description, Third Party Advisory
Impacted products
Vendor Product Version
sealevel seaconnect_370w_firmware 1.3.34
sealevel seaconnect_370w -
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Sealevel\"",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Sealevel Systems, Inc. SeaConnect 370W v1.3.34"
            }
          ]
        }
      ],
      "source": "talos-cna@cisco.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:sealevel:seaconnect_370w_firmware:1.3.34:*:*:*:*:*:*:*",
              "matchCriteriaId": "06014E46-DFB2-45C7-99FD-972EBCCC5FD3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        },
        {
          "cpeMatch": [
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              "matchCriteriaId": "D8CC996D-F36A-4B26-BD50-68F88D24D001",
              "vulnerable": false
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An out-of-bounds write vulnerability exists in the HandleSeaCloudMessage functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. The HandleIncomingSeaCloudMessage function uses at [4] the json_object_get_string to populate the p_payload global variable. The p_payload is only 0x100 bytes long, and the total MQTT message could be up to 0x201 bytes. Because the function json_object_get_string will fill str based on the length of the json\u2019s value and not the actual str size, this would result in a possible out-of-bounds write."
    },
    {
      "lang": "es",
      "value": "Se presenta una vulnerabilidad de escritura fuera de l\u00edmites en la funcionalidad HandleSeaCloudMessage de Sealevel Systems, Inc. SeaConnect 370W versi\u00f3n v1.3.34. La funci\u00f3n HandleIncomingSeaCloudMessage usa en [4] el json_object_get_string para rellenar la variable global p_payload. El p_payload presenta s\u00f3lo 0x100 bytes de longitud, y el mensaje MQTT total podr\u00eda ser de hasta 0x201 bytes. Debido a que la funci\u00f3n json_object_get_string rellenar\u00e1 str bas\u00e1ndose en la longitud del valor de json y no en el tama\u00f1o real de str, esto resultar\u00eda en una posible escritura fuera de l\u00edmites"
    }
  ],
  "id": "CVE-2021-21969",
  "lastModified": "2026-06-17T03:36:28.270",
  "metrics": {
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        "baseSeverity": "MEDIUM",
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          "availabilityImpact": "PARTIAL",
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          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "version": "2.0"
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        "obtainAllPrivilege": false,
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          "confidentialityImpact": "NONE",
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          "role": "CISA Coordinator",
          "timestamp": "2025-04-15T18:19:26.224383Z",
          "version": "2.0.3"
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    ]
  },
  "published": "2022-02-04T23:15:10.753",
  "references": [
    {
      "source": "talos-cna@cisco.com",
      "tags": [
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        "Technical Description",
        "Third Party Advisory"
      ],
      "url": "https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396"
    },
    {
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  "sourceIdentifier": "talos-cna@cisco.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-120"
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          "value": "CWE-787"
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      "source": "nvd@nist.gov",
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    }
  ]
}



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