CVE-2019-13946 Denial of service in Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller
Remote attackers can cause denial of service on Siemens PROFINET IO devices by exhausting memory via diagnostic requests.
- 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-2019-13946?
CVE-2019-13946 is a high-severity denial of service vulnerability in Siemens Development/Evaluation Kits for PROFINET IO: DK Standard Ethernet Controller, published on 11 Feb 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Profinet-IO (PNIO) stack versions prior V06.00 do not properly limit internal resource allocation when multiple legitimate diagnostic package requests are sent to the DCE-RPC interface. This could lead to a denial of service condition due to lack of memory for devices that include a vulnerable version of the stack.
The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device.
Weakness: CWE-400
Which versions are affected by CVE-2019-13946?
It affects 52 products.
Products include Siemens Dk Standard Ethernet Controller, Siemens Ek-Ertec 200 Firmware, Siemens Ek-Ertec 200p Firmware, Siemens Im 154-3 Pn Hf Firmware, Siemens Im 154-4 Pn Hf Firmware, Siemens Profinet Driver and 46 more.
How do I fix CVE-2019-13946?
No fix has been published for CVE-2019-13946 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-2019-13946 being exploited?
There is no known exploitation of CVE-2019-13946 in the wild and no public exploit code.
Sources
Also known as GHSA-8fqx-3qjr-87gw.