{"id":56031,"date":"2025-06-29T23:34:57","date_gmt":"2025-06-29T23:34:57","guid":{"rendered":""},"modified":"2025-09-06T12:12:34","modified_gmt":"2025-09-06T18:12:34","slug":"cve-2025-5867-critical-vulnerability-in-rt-thread-5-1-0-leading-to-system-compromise-or-data-leakage","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-5867-critical-vulnerability-in-rt-thread-5-1-0-leading-to-system-compromise-or-data-leakage\/","title":{"rendered":"CVE-2025-5867: Critical Vulnerability in RT-Thread 5.1.0 leading to system compromise or data leakage<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity landscape is riddled with vulnerabilities that offer potential entry points for malicious actors. One such critical vulnerability, CVE-2025-5867, has been discovered in RT-Thread 5.1.0, an open-source, real-time operating system. This vulnerability specifically affects the file<\/a> rt-thread\/components\/lwp\/lwp_syscall.c, and more precisely, the function csys_sendto. With the right manipulation, this could lead to a null pointer dereference, potentially compromising the system<\/a> or causing data leakage. This vulnerability is of significant concern to all users of RT-Thread<\/a> 5.1.0 due to its potential to cause extensive harm.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-5867
\nSeverity: Critical (CVSS score 8.0)
\nAttack Vector: Local network
\nPrivileges Required: Low
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise or data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

RT-Thread | 5.1.0<\/p>\n

How the Exploit Works<\/strong><\/p>\n

This vulnerability resides in the csys_sendto function of the lwp_syscall.c file<\/a> in RT-Thread 5.1.0. An attacker can manipulate the arguments to this function, leading to a null pointer dereference<\/a>. This could allow the attacker to execute arbitrary code<\/a> or cause a denial of service (DoS) by crashing the system.
\nIn essence, an attacker who successfully exploits this vulnerability could potentially gain control of the affected system<\/a> or gain access to sensitive information, which could lead to extensive data breaches.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

This is a conceptual example demonstrating how the vulnerability might be exploited. It is not a real exploit but a simplified representation.<\/p>\n

#include \n#include \nint main() {\nchar *malicious_payload = NULL;\ncsys_sendto(malicious_payload);\nreturn 0;\n}<\/code><\/pre>\n
In this pseudo-code, a NULL pointer is sent to the csys_sendto function, triggering the vulnerability<\/a>. An actual exploit would likely be more complex and specifically crafted to cause maximum damage or gain unauthorized access<\/a> to the system.
\nIn conclusion, it is paramount for users of RT-Thread 5.1.0 to mitigate this vulnerability<\/a> by applying the vendor patch or using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) for temporary mitigation.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity landscape is riddled with vulnerabilities that offer potential entry points for malicious actors. One such critical vulnerability, CVE-2025-5867, has been discovered in RT-Thread 5.1.0, an open-source, real-time operating system. This vulnerability specifically affects the file rt-thread\/components\/lwp\/lwp_syscall.c, and more precisely, the function csys_sendto. With the right manipulation, this could lead to a null […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-56031","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-dos"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t