CVE-2017-9938 Denial of service in SIMATIC Logon All versions before V1.6
Attackers can cause a denial-of-service condition in Siemens SIMATIC Logon by sending specially crafted packets to the remote access service.
- 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-2017-9938?
CVE-2017-9938 is a high-severity denial of service vulnerability in SIMATIC Logon All versions before V1.6, published on 8 Aug 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was discovered in Siemens SIMATIC Logon (All versions before V1.6) that could allow specially crafted packets sent to the SIMATIC Logon Remote Access service on port 16389/tcp to cause a Denial-of-Service condition. The service restarts automatically.
Which versions are affected by CVE-2017-9938?
It affects 1 product.
Products include Siemens Simatic Logon.
How do I fix CVE-2017-9938?
No fix has been published for CVE-2017-9938 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-2017-9938 being exploited?
There is no known exploitation of CVE-2017-9938 in the wild and no public exploit code.
Other vulnerabilities in SIMATIC Logon All versions before V1.6
Sources
Also known as GHSA-gr6m-h2q8-p89j.