Overview
The CVE-2025-47869 vulnerability is a severe flaw discovered in Apache NuttX RTOS’s xmlrpc application. This vulnerability arises from incorrect restriction of operations within a memory buffer of the application, which could potentially result in a buffer overflow. Users and organizations that have based their code on the affected example application are at risk and need to urgently address this vulnerability to prevent potential system compromise or data leakage.
This flaw affects Apache NuttX RTOS releases from 6.22 to before 12.9.0. The severity of the issue, coupled with the widespread use of Apache NuttX RTOS in numerous applications, makes this a critical cybersecurity concern that must be addressed promptly.
Vulnerability Summary
CVE ID: CVE-2025-47869
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Apache NuttX RTOS | 6.22 to before 12.9.0
How the Exploit Works
The vulnerability lies in the improper restriction of operations within the bounds of a memory buffer in the xmlrpc application of Apache NuttX RTOS. The application has a device stats structure that stores remotely provided parameters. This structure has a hardcoded buffer size, creating a potential for buffer overflow if excessively large data is inputted. The structure members buffer sizes were updated to a valid size of CONFIG_XMLRPC_STRINGSIZE+1, but this does not prevent buffer overflow in all cases.
Conceptual Example Code
Below is a conceptual example of how this vulnerability might be exploited. In this example, the attacker sends a payload that exceeds the buffer limit via a POST request to the vulnerable endpoint.
POST /xmlrpc/device_stats HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "remotely_provided_parameter": "[A STRING LONGER THAN THE CONFIG_XMLRPC_STRINGSIZE+1]" }In this example, replacing “[A STRING LONGER THAN THE CONFIG_XMLRPC_STRINGSIZE+1] with a string that exceeds the buffer limit can cause a buffer overflow, potentially leading to system compromise or data leakage.