CVE-2024-24334
📋 TL;DR
A heap buffer overflow vulnerability in the dfs_v2 dfs_file component of RT-Thread allows attackers to execute arbitrary code or cause denial of service. This affects all systems running RT-Thread versions through 5.0.2, particularly embedded devices and IoT systems using this real-time operating system.
💻 Affected Systems
- RT-Thread
📦 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 affected devices.
If Mitigated
Limited impact if proper memory protections and exploit mitigations are enabled.
🎯 Exploit Status
Proof of concept available in disclosure references. Heap overflow requires specific conditions but is exploitable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.0.3 or later
Vendor Advisory: https://github.com/RT-Thread/rt-thread/issues/8282
Restart Required: Yes
Instructions:
1. Update RT-Thread to version 5.0.3 or later. 2. Apply patch from GitHub pull request #8305. 3. Rebuild and redeploy the RT-Thread system.
🔧 Temporary Workarounds
Disable dfs_v2 filesystem
allRemove or disable the vulnerable dfs_v2 component if not required
Modify RT-Thread configuration to exclude DFS_V2 support
🧯 If You Can't Patch
- Implement strict network segmentation to isolate RT-Thread devices
- Enable exploit mitigations like ASLR and stack canaries if supported
🔍 How to Verify
Check if Vulnerable:
Check RT-Thread version and verify dfs_v2 component is enabledCheck Version:
Check RT-Thread build configuration or version header filesVerify Fix Applied:
Verify RT-Thread version is 5.0.3+ and check that patch #8305 is applied📡 Detection & Monitoring
Log Indicators:
- Unexpected system crashes
- Memory corruption errors in system logs
- Abnormal filesystem operations
Network Indicators:
- Unusual network traffic to RT-Thread device ports
- Exploit attempt patterns matching heap overflow
SIEM Query:
Search for: 'RT-Thread crash' OR 'heap corruption' OR 'dfs_v2 error' in device logs🔗 References
- 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/8282
- https://github.com/RT-Thread/rt-thread/pull/8305
- https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt
- 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/8282
- https://github.com/RT-Thread/rt-thread/pull/8305
- https://github.com/hnsecurity/vulns/blob/main/HNS-2024-05-rt-thread.txt
- https://security.humanativaspa.it/multiple-vulnerabilities-in-rt-thread-rtos/
