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.
[
{
"product": "Beckhoff TwinCAT",
"vendor": "ICS-CERT",
"versions": [
{
"status": "affected",
"version": "Version 3"
}
]
}
]