CVE-2020-25242 Denial of service in SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants)
Attackers can cause a denial-of-service condition on Siemens SIMATIC NET CP devices by sending specially crafted packets to TCP port 102.
- 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-2020-25242?
CVE-2020-25242 is a high-severity denial of service vulnerability in Siemens SIMATIC NET CP 343-1 Advanced (incl. SIPLUS variants), published on 12 May 2021. 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 NET CP 343-1 Advanced (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Lean (incl. SIPLUS variants) (All versions), SIMATIC NET CP 343-1 Standard (incl. SIPLUS variants) (All versions). Specially crafted packets sent to TCP port 102 could cause a Denial-of-Service condition on the affected devices. A cold restart might be necessary in order to recover.
Weakness: CWE-400
Which versions are affected by CVE-2020-25242?
It affects 3 products.
Products include Siemens Simatic Net Cp 343-1 Advanced Firmware, Siemens Simatic Net Cp 343-1 Lean Firmware, Siemens Simatic Net Cp 343-1 Standard Firmware.
How do I fix CVE-2020-25242?
No fix has been published for CVE-2020-25242 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-2020-25242 being exploited?
There is no known exploitation of CVE-2020-25242 in the wild and no public exploit code.
Sources
Also known as GHSA-73pj-g97w-qp62.