CVE-2017-1000230 Denial of service in n/a
An attacker can crash the Snap7 Server by sending unexpected input to the ItemCount field in S7 protocol functions, causing a denial of 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-2017-1000230?
CVE-2017-1000230 is a high-severity denial of service vulnerability in n/a, published on 17 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Snap7 Server version 1.4.1 can be crashed when the ItemCount field of the ReadVar or WriteVar functions of the S7 protocol implementation in Snap7 are provided with unexpected input, thus resulting in denial of service attack.
Weakness: CWE-20
Which versions are affected by CVE-2017-1000230?
It affects 1 product.
Products include Snap7 Project Snap7 Server.
How do I fix CVE-2017-1000230?
No fix has been published for CVE-2017-1000230 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-2017-1000230 being exploited?
There is no known exploitation of CVE-2017-1000230 in the wild and no public exploit code.
Sources
Also known as GHSA-58r9-jqc4-jgp3.