Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
https://exchange.xforce.ibmcloud.com/vulnerabilities/69803
http://www.us-cert.gov/control_systems/pdf/ICSA-11-244-01.pdf
http://support.automation.siemens.com/WW/view/en/29054992