CVE-2021-21968 Path traversal in Sealevel
An attacker can overwrite arbitrary files via a crafted MQTT payload in the OTA update task, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-21968?
CVE-2021-21968 is a high-severity path traversal vulnerability in Sealevel, published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A file write vulnerability exists in the OTA update task functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted MQTT payload can lead to arbitrary file overwrite. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
Weakness: CWE-20
Which versions are affected by CVE-2021-21968?
It affects 1 product.
Products include Sealevel Seaconnect 370w Firmware.
How do I fix CVE-2021-21968?
No fix has been published for CVE-2021-21968 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-21968 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21968 exists.
Other vulnerabilities in Sealevel
Sources
Also known as GHSA-fmc6-6r82-9j7v.