CVE-2022-31206 Missing authorization in n/a
Attackers can inject arbitrary machine code into Omron SYSMAC PLCs due to lack of cryptographic authentication on downloaded logic, enabling remote 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-2022-31206?
CVE-2022-31206 is a critical missing authorization vulnerability in n/a, published on 26 Jul 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Omron SYSMAC Nx product family PLCs (NJ series, NY series, NX series, and PMAC series) through 2022-005-18 lack cryptographic authentication. These PLCs are programmed using the SYMAC Studio engineering software (which compiles IEC 61131-3 conformant POU code to native machine code for execution by the PLC's runtime). The resulting machine code is executed by a runtime, typically controlled by a real-time operating system. The logic that is downloaded to the PLC does not seem to be cryptographically authenticated, allowing an attacker to manipulate transmitted object code to the PLC and execute arbitrary machine code on the processor of the PLC's CPU module in the context of the runtime. In the case of at least the NJ series, an RTOS and hardware combination is used that would potentially allow for memory protection and privilege separation and thus limit the impact of code execution. However, it was not confirmed whether these sufficiently segment the runtime from the rest of the RTOS.
Weakness: CWE-347
Which versions are affected by CVE-2022-31206?
It affects 25 products.
Products include Omron Nj101-1000 Firmware, Omron Nj101-1020 Firmware, Omron Nj101-9000 Firmware, Omron Nj101-9020 Firmware, Omron Nj301-1100 Firmware, Omron Nj301-1200 Firmware and 19 more.
How do I fix CVE-2022-31206?
No fix has been published for CVE-2022-31206 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2022-31206 being exploited?
There is no known exploitation of CVE-2022-31206 in the wild and no public exploit code.
Sources
Also known as GHSA-fw2j-wpp5-8vp5.