The HandleCrashedAircraft function in aircraft_cmd.cpp in OpenTTD 0.3.6 through 1.3.2 allows remote attackers to cause a denial of service (out-of-bounds read and crash) by crashing an aircraft outside of the map.
bugs.openttd.org/task/5820
lists.opensuse.org/opensuse-updates/2013-12/msg00095.html
seclists.org/oss-sec/2013/q4/375
secunia.com/advisories/55589
secunia.com/advisories/56218
vcs.openttd.org/svn/changeset/26134
www.securityfocus.com/bid/64003
exchange.xforce.ibmcloud.com/vulnerabilities/89334
security.openttd.org/en/CVE-2013-6411