CVE-2019-18261 Auth bypass in Omron PLC CJ, CS and NJ Series
Attackers can bypass authentication via brute force attacks on Omron PLCs due to missing rate limiting, potentially gaining unauthorized access.
- 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-2019-18261?
CVE-2019-18261 is a critical authentication bypass vulnerability in Omron PLC CJ, CS and NJ Series, published on 16 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Omron PLC CS series, all versions, Omron PLC CJ series, all versions, and Omron PLC NJ series, all versions, the software does not implement sufficient measures to prevent multiple failed authentication attempts within in a short time frame, making it more susceptible to brute force attacks.
Weakness: CWE-307
Which versions are affected by CVE-2019-18261?
It affects 3 products.
Products include Omron Plc Cj Firmware, Omron Plc Cs Firmware, Omron Plc Nj Firmware.
How do I fix CVE-2019-18261?
No fix has been published for CVE-2019-18261 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2019-18261 being exploited?
There is no known exploitation of CVE-2019-18261 in the wild and no public exploit code.
Other vulnerabilities in Omron PLC CJ, CS and NJ Series
Sources
Also known as GHSA-pgg2-jx97-c5m4.