Overview
The CVE-2025-32400 is a critical vulnerability discovered in RT-Labs P-Net version 1.0.1 or earlier. This vulnerability exposes IO devices that use the library to potential system compromise or data leakage. The vulnerability lies in a heap-based buffer overflow that can be triggered by sending a malicious RPC packet. This vulnerability matters because it can allow an attacker to crash IO devices, potentially leading to data leakage or system compromise.
Vulnerability Summary
CVE ID: CVE-2025-32400
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
RT-Labs P-Net | v1.0.1 or earlier
How the Exploit Works
The exploit works by an attacker crafting a malicious Remote Procedure Call (RPC) packet and sending it to the P-Net network. The malicious packet can cause a heap-based buffer overflow in the P-Net library, causing a crash in IO devices using the library. By choosing the right data to overflow the buffer, an attacker could potentially gain control over the system or cause data leakage.
Conceptual Example Code
This is a conceptual example and does not represent an actual exploit code. It shows how a malicious RPC packet might be constructed and sent to a vulnerable device.
POST /rpc/pnet HTTP/1.1
Host: target.example.com
Content-Type: application/octet-stream
{ "rpc_call": "overflow",
"data": "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA..."}In this example, the “data” field contains an excessively long string of “A”s, intended to overflow the buffer in the P-Net library and cause a crash. An actual exploit would use carefully crafted data to try to take control of the system or leak data.
In mitigation, vendors should apply patches as provided by RT-Labs. In the absence of a patch, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation against the exploit.
