OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in CIP message parsing when handling malformed explicit requests with a forged EPath size. An attacker can send a valid ENIP SendRRData frame carrying a very short CIP payload whose path_size field claims that many more path words are present than are actually available. Because the parser trusts the attacker-controlled path_size and continues decoding path segments without a remaining-length boundary, it reads beyond the end of the stack receive buffer.
| Vendor | Product | Versions |
|---|---|---|
| opener | opener | n/a |
Updated vendor to OpENer, product to CIP Message Parsing, severity to HIGH, and noted that there is no exploit available.
Initial creation
