CVE-2021-21970
Last modified
CVE-2021-21970 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. An out-of-bounds write vulnerability exists in the HandleSeaCloudMessage functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. EPSS estimates a 0.88% chance of exploitation in the next 30 days.
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 [3] the json_object_get_string to populate the p_name global variable. The p_name is only 0x80 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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Sealevel | Seaconnect 370w Firmware | 1.3.34 |
References
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396Exploit, Technical Description, Third Party Advisory
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396Exploit, Technical Description, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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