Gesytec Easylon OPC Server before 2.3.44 does not properly validate server handles, which allows remote attackers to execute arbitrary code or cause a denial of service via unspecified network traffic to the OLE for Process Control (OPC) interface, probably related to free operations on arbitrary memory addresses through certain Remove functions, and read and write operations on arbitrary memory addresses through certain Set, Read, and Write functions.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://secunia.com/advisories/28079 | third party advisory |
| http://www.neutralbit.com/en/rd/opctest/ | |
| http://osvdb.org/42650 | vdb entry |
| http://www.neutralbit.com/downloads/NB-NB-001-EXT-OPC%20Security%20Testing.pdf | |
| http://www.securityfocus.com/bid/26876 | vdb entry |
| http://www.kb.cert.org/vuls/id/205073 | patch third party advisory us government resource |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/39062 | vdb entry |