FKIE_CVE-2021-21969
Vulnerability from fkie_nvd - Published: 2022-02-04 23:15 - Updated: 2026-06-17 03:36
Severity
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
| URL | Tags | ||
|---|---|---|---|
| talos-cna@cisco.com | https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396 | Exploit, Technical Description, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396 | Exploit, Technical Description, Third Party Advisory |
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| sealevel | seaconnect_370w_firmware | 1.3.34 | |
| sealevel | seaconnect_370w | - |
{
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"vendor": "n/a",
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}
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"cveTags": [],
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"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"
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],
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"lastModified": "2026-06-17T03:36:28.270",
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}
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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
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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- Not confirmed: The user expressed doubt about the validity of the vulnerability.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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