Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sealevel | Seaconnect 370W Firmware | 1.3.34 |
| Sealevel | Seaconnect 370W | - |
Related Weaknesses (CWE)
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396ExploitTechnical DescriptionThird Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396ExploitTechnical DescriptionThird Party Advisory
FAQ
What is CVE-2021-21969?
CVE-2021-21969 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 jso...
How severe is CVE-2021-21969?
CVE-2021-21969 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-21969?
Check the references section above for vendor advisories and patch information. Affected products include: Sealevel Seaconnect 370W Firmware, Sealevel Seaconnect 370W.