CVE-2018-16558 Denial of service in SIMATIC S7-1500 CPU
Unauthenticated remote attackers can cause a denial-of-service condition on Siemens SIMATIC S7-1500 CPUs via crafted network 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-2018-16558?
CVE-2018-16558 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-1500 CPU, published on 17 Apr 2019. 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 S7-1500 CPU (All versions >= V2.0 and < V2.5), SIMATIC S7-1500 CPU (All versions <= V1.8.5). Specially crafted network packets sent to port 80/tcp or 443/tcp could allow an unauthenticated remote attacker to cause a Denial-of-Service condition of the device. The security vulnerability could be exploited by an attacker with network access to the affected systems on port 80/tcp or 443/tcp. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise availability of the device. At the time of advisory publication no public exploitation of this security vulnerability was known.
Weakness: CWE-20
Which versions are affected by CVE-2018-16558?
It affects 1 product.
Products include Siemens Simatic S7-1500 Firmware.
How do I fix CVE-2018-16558?
No fix has been published for CVE-2018-16558 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-2018-16558 being exploited?
There is no known exploitation of CVE-2018-16558 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC S7-1500 CPU
Sources
Also known as GHSA-fc72-f69r-qvh3.