CVE-2024-25395
📋 TL;DR
A buffer overflow vulnerability in RT-Thread's rtlink.c component allows attackers to execute arbitrary code or cause denial of service. This affects RT-Thread RTOS versions through 5.0.2. Systems using RT-Thread with the vulnerable utilities/rt-link component are at risk.
💻 Affected Systems
- RT-Thread Real-Time Operating System
📦 What is this software?
Rt Thread by Rt Thread
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or device takeover.
Likely Case
Denial of service causing system crashes or instability in embedded/IoT devices.
If Mitigated
Limited impact if proper memory protections and input validation are implemented.
🎯 Exploit Status
Proof-of-concept details available in security advisories. Buffer overflow exploitation is well-understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.3 or later
Vendor Advisory: https://github.com/RT-Thread/rt-thread/issues/8289
Restart Required: Yes
Instructions:
1. Update RT-Thread to version 5.0.3 or later. 2. Recompile and redeploy affected systems. 3. Verify the patch is applied.
🔧 Temporary Workarounds
Disable rt-link component
allRemove or disable the vulnerable utilities/rt-link component if not required.
Remove rtlink.c from build configuration
Disable RT_LINK_USING in configuration
Implement input validation
allAdd bounds checking for input to rtlink.c functions.
Add buffer size validation before copy operations
🧯 If You Can't Patch
- Network segmentation to isolate vulnerable devices
- Implement strict input validation and sanitization
🔍 How to Verify
Check if Vulnerable:
Check RT-Thread version and verify utilities/rt-link/src/rtlink.c is present in build.Check Version:
Check RT-Thread version in source code or build configuration.Verify Fix Applied:
Confirm RT-Thread version is 5.0.3 or later and review patch changes in rtlink.c.📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes
- Memory access violation logs
- Abnormal rt-link component behavior
Network Indicators:
- Unusual network traffic to/from RT-Thread devices
- Exploit pattern detection in network traffic
SIEM Query:
Search for 'rtlink' process crashes or memory violation events in system logs.🔗 References
- http://www.openwall.com/lists/oss-security/2024/03/05/1
- https://github.com/RT-Thread/rt-thread/issues/8289
- https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt
- https://seclists.org/fulldisclosure/2024/Mar/28
- https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos/
- http://seclists.org/fulldisclosure/2024/Mar/28
- http://www.openwall.com/lists/oss-security/2024/03/05/1
- https://github.com/RT-Thread/rt-thread/issues/8289
- https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt
- https://seclists.org/fulldisclosure/2024/Mar/28
- https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos/
