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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HOpener Project Opener
APPOpener Project2.3.0
Related vulnerabilities
Integer underflow w OpENer 2.3.0 — krytyczne uszkodzenie pamięci (RCE)
Out-of-bounds read w EIPStackGroup OpENer — przetwarzanie ForwardOpen
Stack Buffer Overflow w OpENer 2.3.0 przy parsowaniu pakietów CIP
Błędna kontrola dostępu w OpENer — przejęcie sesji encapsulation
RCE przez out-of-bounds write w OpENer EtherNet/IP Stack