Secunia Security Advisory – Some vulnerabilities have been reported in OpenTTD, which can be exploited by malicious people to bypass certain security restrictions and cause a DoS (Denial of Service), and by malicious users to cause a DoS and potentially compromise a vulnerable system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/89132/sa39669.txt
Source: https://packetstormsecurity.com/files/89132/Secunia-Security-Advisory-39669.html