Ameeba Security Research

Defensive CVE and exploit intelligence

Ameeba Blog Search
TRENDING · 1 WEEK
Attack Vector
Vendor
Severity

CVE-2025-5869: Critical Memory Corruption Vulnerability in RT-Thread 5.1.0

Views: 421

Overview

The CVE-2025-5869 is a critical vulnerability found in one of the key components of RT-Thread 5.1.0, one of the most widely used open-source real-time operating systems (RTOS) available today. This vulnerability, specifically located within the sys_recvfrom function of the lwp_syscall.c file, has serious implications due to its potential to cause memory corruption. Given RT-Thread’s widespread usage in embedded systems, this vulnerability could have far-reaching impacts, possibly leading to system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-5869
Severity: Critical, CVSS Score: 8.0
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Memory corruption, potential system compromise, or data leakage

Affected Products

Ameeba Chat Icon Share secrets securely

Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.

Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.

  • • Encrypted identity
  • • Private Spaces for organizations and teams
  • • End-to-end encrypted chat, calls, files, and notes
  • • Sensitive AI work and protected collaboration
  • • Built for information that cannot leak

Our mission is to secure human work alongside AI.

Product | Affected Versions

RT-Thread | 5.1.0

How the Exploit Works

The vulnerability arises from the incorrect handling of the ‘from’ argument in the sys_recvfrom function. This function is designed to receive a message from a socket and capture the source address if it’s not NULL. However, the misuse of the ‘from’ argument can lead to memory corruption. An attacker with network access could send a specially crafted packet that, when processed by the sys_recvfrom function, causes the memory corruption. This could potentially allow the attacker to execute arbitrary code or cause a denial of service.

Conceptual Example Code

Here is a conceptual example of a specially crafted packet that could trigger the vulnerability:

POST /rt-thread/sys_recvfrom HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "from": "special crafted string causing memory corruption" }

It’s important to note that this is a conceptual example, and the actual exploit might involve more complex operations.

Mitigation Guidance

Users are strongly encouraged to apply the vendor patch as soon as it becomes available. As a temporary mitigation, users can employ Web Application Firewalls (WAF) or Intrusion Detection Systems (IDS) to monitor and block suspicious network traffic that could potentially exploit this vulnerability. However, these measures provide only temporary relief and may not fully protect the system from a targeted attack exploiting this vulnerability.

Want to discuss this further? Join the Ameeba Cybersecurity Group Chat.

Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

More posts

Ameeba Chat