CVE-2021-25673 Denial of service in SIMATIC S7-PLCSIM V5.4
Local attackers can cause a denial of service in SIMATIC S7-PLCSIM by opening a specially crafted file, leading to an infinite loop.
- 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-2021-25673?
CVE-2021-25673 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, the application could enter an infinite loop, become unresponsive and must be restarted to restore the service.
Weakness: CWE-835
Which versions are affected by CVE-2021-25673?
It affects 1 product.
Products include Siemens Simatic S7-Plcsim.
How do I fix CVE-2021-25673?
No fix has been published for CVE-2021-25673 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-2021-25673 being exploited?
There is no known exploitation of CVE-2021-25673 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC S7-PLCSIM V5.4
Sources
Also known as GHSA-cxqw-29jq-pcjv.