OpENer v2.3/ commit 76b95cf, contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser. This allows a remtoe attacker to cause a denial of service

Out‑of‑Bounds Read in OpENer v2.3.0 Allowing Remote Denial of Service

OpENer v2.3.0 / commit 76b95cf contains an out-of-bounds read in the unconnected explicit messaging path. This allows a remote attacker to cause a denial of service.

Out‑of‑Bounds Read Denial of Service in EIPStackGroup OpENer

EIPStackGroup OpENer v2.3.0/master up to commit 76b95cf contains an out-of-bounds read vulnerability in Connection Manager request parsing. This allows a remote attacker to cause a denial of service.

Opener v2.3 GetAttributeList Buffer Overflow Causes Remote Denial of Service

EIPStackGroup OpENer v2.3 / master commit 76b95cf contains a buffer overflow in the GetAttributeList() implementation for the EtherNet/IP Get_Attribute_List service. This allows a remote attacker to cause a denial of service

Expired Pointer Dereference in EtherNet/IP CPF Handling Allows Remote Denial of Service

EIPStackGroup OpENer v2.3 and master up to commit 76b95cf contain an expired pointer dereference vulnerability in the EtherNet/IP Common Packet Format (CPF) handling logic. This allows a remote attacker to cause a denial of service.

OpENer v2.3/commit 76b95cf, contains an integer underflow in the server-side EtherNet/IP ForwardOpen connection-path parser. This allows a remote attacker to cause a denial of service

OpENer SetAttributeList Out‑of‑Bounds Read Enables Remote Denial of Service

An out-of-bounds read vulnerability exists in EIPStackGroup OpENer v2.3 and master through commit 76b95cf in the server-side CIP SetAttributeList service. This allows a remote attacker to cause a denial of service

OpENer v2.3 EtherNet/IP ForwardOpen Out‑of‑Bounds Read Causes Denial of Service

OpENer v2.3/commit 76b95cf, contains an out-of-bounds read in the server-side EtherNet/IP ForwardOpen connection-path parser. This allows a remote attacker to cause a denial of service.

EIPStackGroup OpENer Buffer Over‑Read in Common Packet Format Parser Causing DoS

An out-of-bounds read vulnerability exists in EIPStackGroup OpENer v2.3 and master up to commit 76b95cf in the EtherNet/IP TCP SendRRData Common Packet Format parser. The issue occurs in CreateCommonPacketFormatStructure() when it parses recognized optional socket address information items of type 0x8000 or 0x8001 without first validating that the remaining CPF buffer contains the complete fixed sockaddr structure. This allows a remote attacker to cause a denial of service.

In OpENer 2.3.0 (commit 76b95cf) when parsing incoming CIP (Common Industrial Protocol) network packets, the length parameter is inconsistently typed across the call stack. Specifically, an upstream length calculated as an int is passed to a downstream function that expects an EipInt16 (a 16-bit signed integer). If a maliciously crafted packet with specific length fields is processed, the length parameter can overflow or be truncated into a negative value. This negative length bypasses subsequent bounds checking (due to signed/unsigned comparison issues) and is ultimately used in memory operations, leading to a Stack Buffer Overflow when reading data in DecodePaddedEPath.

OpENer: OpENer: Out-of-bounds read via malformed ForwardOpen requests

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) has an out-of-bounds read issue in Connection Manager handling of ForwardOpen requests when processing short malformed packets. An attacker can send a valid ENIP outer frame carrying a malformed CIP ForwardOpen/LargeForwardOpen request, causing the parser to continue reading fields even when request data is insufficient. This issue is remotely triggerable via network traffic and does not require authentication.

EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.

Memory Corruption via Integer Underflow in OpENer SendUnitData

OpENer 2.3.0 (master branch up to commit 76b95cf) is vulnerable to a severe memory corruption issue caused by an integer underflow in the processing of connected explicit messages (SendUnitData).

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.

Resource Exhaustion Leading to Denial of Service in OpENer 2.3.0

In OpENer 2.3.0 (commit 76b95cf), a resource exhaustion (Denial of Service) vulnerability exists in its network processing loop.

OpENer Network Stack Buffer Overflow Enables Denial of Service via CPF Packet

A buffer overflow in the Get_Attribute_List function of EIPStackGroup OpENer commit 76b95c allows attackers to cause a Denial of Service (DoS) via supplying a crafted Common Packet Format (CPF) packet.

EIPStackGroup OpENer SendRRData cipmessagerouter.c CreateMessageRouterRequestStructure use after free

A security vulnerability has been detected in EIPStackGroup OpENer up to 2.3.0. Affected is the function CreateMessageRouterRequestStructure of the file cipmessagerouter.c of the component SendRRData Handler. The manipulation leads to use after free. Remote exploitation of the attack is possible. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Out-of-Bounds Read in OpENer Common Packet Format Parser

OpENer v2.3-558-g1e99582 contains an out-of-bounds read vulnerability in the Common Packet Format (CPF) parser, specifically in CreateCommonPacketFormatStructure() in source/src/enet_encap/cpf.c. A crafted ENIP/CPF message can supply an attacker-controlled item_count value that is not consistently validated against the remaining data_length of the CPF slice