In multiple CODESYS products, a remote attacker may craft a request which may cause an unexpected sign extension, resulting in a denial-of-service condition or memory overwrite.
Weakness
The product performs an operation on a number that causes it to be sign extended when it is transformed into a larger data type. When the original number is negative, this can produce unexpected values that lead to resultant weaknesses.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Plcwinnt | Codesys | 2.0 (including) | 2.4.7.57 (excluding) |
| Runtime_toolkit | Codesys | 2.0 (including) | 2.4.7.57 (excluding) |
Potential Mitigations
References
- https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=17139\u0026token=ec67d15a433b61c77154166c20c78036540cacb0\u0026download=
- https://customers.codesys.com/index.php?eID=dumpFile\u0026t=f\u0026f=17139\u0026token=ec67d15a433b61c77154166c20c78036540cacb0\u0026download=