Royal TS before 5 has a 0.0.0.0 listener, which makes it easier for attackers to bypass tunnel authentication via a brute-force approach.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-13872
Reference (s):
- FULLDISC:20200609 RoyalTS SSH Tunnel – Authentication Bypass
- URL: http://seclists.org/fulldisclosure/2020/Jun/14
- http://packetstormsecurity.com/files/158000/RoyalTS-SSH-Tunnel-Authentication-Bypass.html
- https://hacktips.it/royalts-ssh-tunnel-authentication-bypass/

