Buffer overflow in the server in OpenTTD 0.6.1 and earlier allows remote authenticated users to cause a denial of service (persistent game disruption) or possibly execute arbitrary code via vectors involving many long names for "companies and clients."
https://exchange.xforce.ibmcloud.com/vulnerabilities/49221
http://sourceforge.net/project/shownotes.php?release_id=617243
http://security.gentoo.org/glsa/glsa-200903-09.xml
http://secunia.com/advisories/34161
http://marc.info/?l=oss-security&m=121814230706576&w=2
http://marc.info/?l=oss-security&m=121797672406282&w=2
http://marc.info/?l=oss-security&m=121790659421159&w=2
http://marc.info/?l=oss-security&m=121787604812284&w=2