CVE-2022-27640 Denial of service in SIMATIC CP 442-1 RNA
An attacker can cause a denial of service and device reboot by sending excessive ARP broadcast requests to affected Siemens SIMATIC communication processors.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2022-27640?
CVE-2022-27640 is a medium-severity denial of service vulnerability in Siemens SIMATIC CP 442-1 RNA, published on 10 May 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability has been identified in SIMATIC CP 442-1 RNA (All versions < V1.5.18), SIMATIC CP 443-1 RNA (All versions < V1.5.18). The affected devices improperly handles excessive ARP broadcast requests. This could allow an attacker to create a denial of service condition by performing ARP storming attacks, which can cause the device to reboot.
Weakness: CWE-400
Which versions are affected by CVE-2022-27640?
It affects 2 products.
Products include Siemens Simatic Cp 442-1 Rna Firmware, Siemens Simatic Cp 443-1 Rna Firmware.
How do I fix CVE-2022-27640?
No fix has been published for CVE-2022-27640 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-2022-27640 being exploited?
There is no known exploitation of CVE-2022-27640 in the wild and no public exploit code.
Sources
Also known as GHSA-26j8-6884-fcqw.