CVE-2022-2081 Denial of service in RTU500 series CMU firmware
An attacker can cause a denial of service by flooding the HCI Modbus TCP function, leading to a stack overflow and device reboot.
- 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-2022-2081?
CVE-2022-2081 is a high-severity denial of service vulnerability in Hitachi Energy RTU500 series CMU firmware, published on 4 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability exists in the HCI Modbus TCP function included in the product versions listed above. If the HCI Modbus TCP is enabled and configured, an attacker could exploit the vulnerability by sending a specially crafted message to the RTU500 in a high rate, causing the targeted RTU500 CMU to reboot. The vulnerability is caused by a lack of flood control which eventually if exploited causes an internal stack overflow in the HCI Modbus TCP function.
Weakness: CWE-787
Which versions are affected by CVE-2022-2081?
It affects 4 products.
Products include Hitachienergy Rtu520 Firmware, Hitachienergy Rtu530 Firmware, Hitachienergy Rtu540 Firmware, Hitachienergy Rtu560 Firmware.
How do I fix CVE-2022-2081?
No fix has been published for CVE-2022-2081 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2022-2081 being exploited?
There is no known exploitation of CVE-2022-2081 in the wild and no public exploit code.
Other vulnerabilities in Hitachi Energy RTU500 series CMU firmware
Sources
Also known as GHSA-v3xr-m742-g2v3.