CVE-2021-21971 — MEDIUM (5.9)

Vulnerability Description

An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

CVSS Score

5.9

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

HIGH

Availability

NONE

Affected Products

Vendor	Product	Versions
Sealevel	Seaconnect 370W Firmware	1.3.34
Sealevel	Seaconnect 370W	-

Related Weaknesses (CWE)

CWE-787

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406Not ApplicableThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1397ExploitTechnical DescriptionThird Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1406Not ApplicableThird Party Advisory

FAQ

What is CVE-2021-21971?

CVE-2021-21971 is a vulnerability with a CVSS score of 5.9 (MEDIUM). An out-of-bounds write vulnerability exists in the URL_decode functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to an out-of-bounds write. An a...

How severe is CVE-2021-21971?

CVE-2021-21971 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-21971?

Check the references section above for vendor advisories and patch information. Affected products include: Sealevel Seaconnect 370W Firmware, Sealevel Seaconnect 370W.