CVE-2016-3949 Denial of service in n/a
Remote attackers can cause a denial of service on Siemens SIMATIC S7-300 devices by sending crafted ISO-TSAP or Profibus packets.
- 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-2016-3949?
CVE-2016-3949 is a high-severity denial of service vulnerability in n/a, published on 27 Jun 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Siemens SIMATIC S7-300 Profinet-enabled CPU devices with firmware before 3.2.12 and SIMATIC S7-300 Profinet-disabled CPU devices with firmware before 3.3.12 allow remote attackers to cause a denial of service (defect-mode transition) via crafted (1) ISO-TSAP or (2) Profibus packets.
Weakness: CWE-399
Which versions are affected by CVE-2016-3949?
It affects 2 products.
Products include Siemens Simatic S7-300 With Profitnet Support Firmware, Siemens Simatic S7-300 Without Profitnet Support Firmware.
How do I fix CVE-2016-3949?
No fix has been published for CVE-2016-3949 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-2016-3949 being exploited?
There is no known exploitation of CVE-2016-3949 in the wild and no public exploit code.
Sources
Also known as GHSA-xx3r-7m7h-68q2.