CVE-2021-32976 Moxa NPort IAW5000A-I/O Series Serial Device Server Stack-based Buffer Overflow
Remote attackers can exploit stack-based buffer overflows in the web server to execute arbitrary code or cause denial of service on Moxa serial device servers.
- 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-2021-32976?
CVE-2021-32976 is a critical memory corruption vulnerability in Moxa NPort IAW5000A-I/O series firmware, published on 1 Apr 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Five buffer overflows in the built-in web server in Moxa NPort IAW5000A-I/O series firmware version 2.2 or earlier may allow a remote attacker to initiate a denial-of-service attack and execute arbitrary code.
Which versions are affected by CVE-2021-32976?
It affects 4 products.
Products include Moxa Nport Iaw5150a-12i\/O Firmware, Moxa Nport Iaw5150a-6i\/O Firmware, Moxa Nport Iaw5250a-12i\/O Firmware, Moxa Nport Iaw5250a-6i\/O Firmware.
How do I fix CVE-2021-32976?
No fix has been published for CVE-2021-32976 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-2021-32976 being exploited?
There is no known exploitation of CVE-2021-32976 in the wild and no public exploit code.
Other vulnerabilities in Moxa NPort IAW5000A-I/O series firmware
Sources
Also known as GHSA-gr95-77pj-2gv2.