CVE-2016-9158 Denial of service in SIMATIC S7-300 CPU family
Specially crafted packets sent to port 80 cause Siemens SIMATIC S7-300/400 CPUs to enter defect mode, requiring a cold restart to recover.
- 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-2016-9158?
CVE-2016-9158 is a high-severity denial of service vulnerability in Siemens AG SIMATIC S7-300 CPU family, published on 17 Dec 2016. 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 S7-300 CPU family (All versions), SIMATIC S7-300 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V6 and below CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP V7 CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 V6 and earlier CPU family (All versions), SIMATIC S7-400 V7 CPU family (All versions). Specially crafted packets sent to port 80/tcp could cause the affected devices to go into defect mode. A cold restart is required to recover the system.
Weakness: CWE-20
Which versions are affected by CVE-2016-9158?
It affects 2 products.
Products include Siemens Simatic S7-300 Cpu Firmware, Siemens Simatic S7-400 Cpu Firmware.
How do I fix CVE-2016-9158?
No fix has been published for CVE-2016-9158 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-2016-9158 being exploited?
There is no known exploitation of CVE-2016-9158 in the wild and no public exploit code.
Other vulnerabilities in Siemens AG SIMATIC S7-300 CPU family
Sources
Also known as GHSA-pmf4-x4c5-385f.