PuTTY before 0.73 on Windows improperly opens port-forwarding listening sockets, which allows attackers to listen on the same port to steal an incoming connection.
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-17067.json"
[ { "events": [ { "introduced": "0" }, { "fixed": "0.73" } ] } ]