CVE-2021-25675 Denial of service in SIMATIC S7-PLCSIM V5.4
A local attacker can cause a denial of service in SIMATIC S7-PLCSIM by opening a specially crafted file, triggering a divide-by-zero error.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-25675?
CVE-2021-25675 is a medium-severity denial of service vulnerability in Siemens SIMATIC S7-PLCSIM V5.4, published on 15 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC S7-PLCSIM V5.4 (All versions). An attacker with local access to the system could cause a Denial-of-Service condition in the application when it is used to open a specially crafted file. As a consequence, a divide by zero operation could occur and cause the application to terminate unexpectedly and must be restarted to restore the service.
Weakness: CWE-369
Which versions are affected by CVE-2021-25675?
It affects 1 product.
Products include Siemens Simatic S7-Plcsim.
How do I fix CVE-2021-25675?
No fix has been published for CVE-2021-25675 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-2021-25675 being exploited?
There is no known exploitation of CVE-2021-25675 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC S7-PLCSIM V5.4
Sources
Also known as GHSA-mcvp-7wv4-cg3w.