CVE-2021-21960 Memory corruption in Sealevel
A stack-based buffer overflow in the LLMNR functionality allows remote attackers to execute arbitrary code via a malicious network packet.
- 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-2021-21960?
CVE-2021-21960 is a critical memory corruption 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 stack-based buffer overflow vulnerability exists in both the LLMNR functionality of Sealevel Systems, Inc. SeaConnect 370W v1.3.34. A specially-crafted network packet can lead to remote code execution. An attacker can send a malicious packet to trigger this vulnerability.
Which versions are affected by CVE-2021-21960?
It affects 1 product.
Products include Sealevel Seaconnect 370w Firmware.
How do I fix CVE-2021-21960?
No fix has been published for CVE-2021-21960 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-2021-21960 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-21960 exists.
Other vulnerabilities in Sealevel
Sources
Also known as GHSA-8927-m9qj-7wh3.