CVE-2023-36521 Denial of service in SIMATIC MV540 H
An attacker can cause a denial of service in Siemens SIMATIC MV devices if the result synchronization server is enabled.
- 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-2023-36521?
CVE-2023-36521 is a high-severity denial of service vulnerability in Siemens SIMATIC MV540 H, published on 11 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC MV540 H (All versions < V3.3.4), SIMATIC MV540 S (All versions < V3.3.4), SIMATIC MV550 H (All versions < V3.3.4), SIMATIC MV550 S (All versions < V3.3.4), SIMATIC MV560 U (All versions < V3.3.4), SIMATIC MV560 X (All versions < V3.3.4). The result synchronization server of the affected products contains a vulnerability that may lead to a denial of service condition. An attacker may cause a denial of service situation of all socket-based communication of the affected products if the result server is enabled.
Weakness: CWE-770
Which versions are affected by CVE-2023-36521?
It affects 6 products.
Products include Siemens Simatic Mv540 H Firmware, Siemens Simatic Mv540 S Firmware, Siemens Simatic Mv550 H Firmware, Siemens Simatic Mv550 S Firmware, Siemens Simatic Mv560 U Firmware, Siemens Simatic Mv560 X Firmware.
How do I fix CVE-2023-36521?
No fix has been published for CVE-2023-36521 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-2023-36521 being exploited?
There is no known exploitation of CVE-2023-36521 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC MV540 H
Sources
Also known as GHSA-g2ch-vrrq-vf7w.