CVE-2017-16718 Weak cryptography in Beckhoff TwinCAT
Attackers with network access can extract a fixed encryption key to bypass authentication in Beckhoff TwinCAT 3 ADS route configuration.
- 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-2017-16718?
CVE-2017-16718 is a medium-severity vulnerability in ICS-CERT Beckhoff TwinCAT, published on 27 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Beckhoff TwinCAT 3 supports communication over ADS. ADS is a protocol for industrial automation in protected environments. This protocol uses user configured routes, that can be edited remotely via ADS. This special command supports encrypted authentication with username/password. The encryption uses a fixed key, that could be extracted by an attacker. Precondition of the exploitation of this weakness is network access at the moment a route is added.
Which versions are affected by CVE-2017-16718?
It affects 1 product.
Products include Beckhoff Twincat.
How do I fix CVE-2017-16718?
No fix has been published for CVE-2017-16718 yet. Limit exposure of the affected software until one is available.
Is CVE-2017-16718 being exploited?
There is no known exploitation of CVE-2017-16718 in the wild and no public exploit code.
Other vulnerabilities in ICS-CERT Beckhoff TwinCAT
Sources
Also known as GHSA-wx26-fm45-hvxc.