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
Link Resource
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1396 Exploit Technical Description Third Party Advisory
History

No history.

cve-icon MITRE Information

Status: PUBLISHED

Assigner: talos

Published: 2022-02-04T22:29:00

Updated: 2022-02-04T22:29:00

Reserved: 2021-01-04T00:00:00


Link: CVE-2021-21969

JSON object: View

cve-icon NVD Information

Status : Analyzed

Published: 2022-02-04T23:15:10.753

Modified: 2022-10-01T02:12:04.533


Link: CVE-2021-21969

JSON object: View

cve-icon Redhat Information

No data.