CVE-2021-21967 Memory corruption in SeaConnect 370W
An out-of-bounds write in the OTA update task allows a man-in-the-middle attacker to cause a denial of service via a crafted MQTT payload.
- 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-2021-21967?
CVE-2021-21967 is a medium-severity memory corruption vulnerability in Sealevel Systems, Inc. SeaConnect 370W, published on 14 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An out-of-bounds 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 denial of service. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.
Weakness: CWE-120
Which versions are affected by CVE-2021-21967?
It affects 1 product.
Products include Sealevel Seaconnect 370w Firmware.
How do I fix CVE-2021-21967?
No fix has been published for CVE-2021-21967 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-21967 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21967 exists.
Other vulnerabilities in Sealevel Systems, Inc. SeaConnect 370W
Sources
Also known as GHSA-8hfr-mj47-7cxj.