CVE-2023-27396 Missing authorization in Multiple OMRON products which implement FINS protocol
Attackers can execute arbitrary commands or retrieve system information from OMRON PLCs due to lack of authentication in the FINS protocol.
- 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-2023-27396?
CVE-2023-27396 is a critical missing authorization vulnerability in Multiple OMRON products which implement FINS protocol, published on 19 Jun 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
FINS (Factory Interface Network Service) is a message communication protocol, which is designed to be used in closed FA (Factory Automation) networks, and is used in FA networks composed of OMRON products. Multiple OMRON products that implement FINS protocol contain following security issues -- (1)Plaintext communication, and (2)No authentication required. When FINS messages are intercepted, the contents may be retrieved. When arbitrary FINS messages are injected, any commands may be executed on, or the system information may be retrieved from, the affected device. Affected products and versions are as follows: SYSMAC CS-series CPU Units, all versions, SYSMAC CJ-series CPU Units, all versions, SYSMAC CP-series CPU Units, all versions, SYSMAC NJ-series CPU Units, all versions, SYSMAC NX1P-series CPU Units, all versions, SYSMAC NX102-series CPU Units, all versions, and SYSMAC NX7 Database Connection CPU Units (Ver.1.16 or later)
Weakness: CWE-306
Which versions are affected by CVE-2023-27396?
It affects 271 products.
Products include Omron Cj2h-Cpu64-Eip Firmware, Omron Cj2h-Cpu64 Firmware, Omron Cj2h-Cpu65-Eip Firmware, Omron Cj2h-Cpu65 Firmware, Omron Cj2h-Cpu66-Eip Firmware, Omron Cj2h-Cpu66 Firmware and 265 more.
How do I fix CVE-2023-27396?
No fix has been published for CVE-2023-27396 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-2023-27396 being exploited?
There is no known exploitation of CVE-2023-27396 in the wild and no public exploit code.
Sources
Also known as GHSA-5mw2-67q5-9c2w.