CVE-2019-19281 Denial of service in SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
Unauthenticated attackers can cause denial of service on Siemens SIMATIC controllers by sending specially crafted UDP packets.
- 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-2019-19281?
CVE-2019-19281 is a high-severity denial of service vulnerability in Siemens AG SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants), published on 10 Mar 2020. 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 ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions >= V2.5 and < V20.8), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions >= V2.5 and < V2.8), SIMATIC S7-1500 Software Controller (All versions >= V2.5 and < V20.8). Affected devices contain a vulnerability that allows an unauthenticated attacker to trigger a Denial-of-Service condition. The vulnerability can be triggered if specially crafted UDP packets are sent to the device. The security vulnerability could be exploited by an attacker with network access to the affected systems. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the device availability.
Weakness: CWE-400
Which versions are affected by CVE-2019-19281?
It affects 14 products.
Products include Siemens Simatic Et 200sp Open Controller Cpu 1515sp Pc2 Firmware, Siemens Simatic S7-1500 Cpu 1507s F Firmware, Siemens Simatic S7-1500 Cpu 1507s Firmware, Siemens Simatic S7-1500 Cpu 1508s F Firmware, Siemens Simatic S7-1500 Cpu 1508s Firmware, Siemens Simatic S7-1500 Cpu 1511-1 Pn Firmware and 8 more.
How do I fix CVE-2019-19281?
No fix has been published for CVE-2019-19281 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-2019-19281 being exploited?
There is no known exploitation of CVE-2019-19281 in the wild and no public exploit code.
Other vulnerabilities in Siemens AG SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants)
Sources
Also known as GHSA-4cqc-hc5r-xhj6.