CVE-2020-15783 Denial of service in SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)
Attackers can cause a denial of service on Siemens industrial controllers by sending crafted packets, requiring a cold restart to recover.
- 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-2020-15783?
CVE-2020-15783 is a high-severity denial of service vulnerability in Siemens SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants), published on 12 Nov 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 S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC TDC CPU555 (All versions), SINUMERIK 840D sl (All versions). Sending multiple specially crafted packets to the affected devices could cause a Denial-of-Service on port 102. A cold restart is required to recover the service.
Weakness: CWE-400
Which versions are affected by CVE-2020-15783?
It affects 12 products.
Products include Siemens Simatic S7-300 Cpu 312 Firmware, Siemens Simatic S7-300 Cpu 314 Firmware, Siemens Simatic S7-300 Cpu 315-2 Dp Firmware, Siemens Simatic S7-300 Cpu 315-2 Pn Firmware, Siemens Simatic S7-300 Cpu 315f-2 Dp Firmware, Siemens Simatic S7-300 Cpu 315f-2 Pn Firmware and 6 more.
How do I fix CVE-2020-15783?
No fix has been published for CVE-2020-15783 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-2020-15783 being exploited?
There is no known exploitation of CVE-2020-15783 in the wild and no public exploit code.
Other vulnerabilities in Siemens SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants)
Sources
Also known as GHSA-h3cm-r647-2vf6.