CVE-2023-50821 Denial of service in SIMATIC PCS 7 V9.1
Attackers can cause persistent denial of service in Siemens SIMATIC PCS 7 and WinCC products by exploiting improper input validation in the login dialog.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-50821?
CVE-2023-50821 is a medium-severity denial of service vulnerability in Siemens SIMATIC PCS 7 V9.1, published on 9 Apr 2024. 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 PCS 7 V9.1 (All versions < V9.1 SP2 UC04), SIMATIC WinCC Runtime Professional V17 (All versions < V17 Update 8), SIMATIC WinCC Runtime Professional V18 (All versions < V18 Update 4), SIMATIC WinCC Runtime Professional V19 (All versions < V19 Update 1), SIMATIC WinCC V7.5 (All versions < V7.5 SP2 Update 16), SIMATIC WinCC V8.0 (All versions < V8.0 Update 5). The affected products do not properly validate the input provided in the login dialog box. An attacker could leverage this vulnerability to cause a persistent denial of service condition.
Weakness: CWE-120
Which versions are affected by CVE-2023-50821?
How do I fix CVE-2023-50821?
No fix has been published for CVE-2023-50821 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-2023-50821 being exploited?
There is no known exploitation of CVE-2023-50821 in the wild and no public exploit code.
Sources
Also known as GHSA-m32q-g43c-p863.