CVE-2025-1674
📋 TL;DR
CVE-2025-1674 is an out-of-bounds read vulnerability in Zephyr RTOS caused by insufficient input validation of network packets. Attackers can exploit this to read sensitive memory contents or cause denial of service. This affects systems running vulnerable versions of Zephyr RTOS with network functionality enabled.
💻 Affected Systems
- Zephyr RTOS
📦 What is this software?
Zephyr by Zephyrproject
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure of sensitive memory contents, potential system crash leading to denial of service, or as a stepping stone for further exploitation.
Likely Case
Denial of service through system crashes or instability, with potential information leakage depending on memory layout.
If Mitigated
Limited impact with proper network segmentation and input validation controls in place.
🎯 Exploit Status
Exploitation requires sending malicious network packets to vulnerable systems.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Zephyr security advisory for specific patched version
Vendor Advisory: https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-x975-8pgf-qh66
Restart Required: Yes
Instructions:
1. Review the Zephyr security advisory. 2. Update to the patched version of Zephyr RTOS. 3. Rebuild and redeploy affected firmware. 4. Restart devices.
🔧 Temporary Workarounds
Network Segmentation
allIsolate vulnerable devices from untrusted networks using firewalls or VLANs.
Input Validation Enhancement
allImplement additional packet validation at application layer if possible.
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure.
- Monitor systems for crashes or unusual network activity.
🔍 How to Verify
Check if Vulnerable:
Check Zephyr version against affected versions in the security advisory.Check Version:
Check Zephyr build configuration or device firmware version.Verify Fix Applied:
Verify Zephyr version is updated to patched version and test with valid network traffic.📡 Detection & Monitoring
Log Indicators:
- System crashes
- Unexpected reboots
- Memory access errors in logs
Network Indicators:
- Malformed network packets targeting Zephyr devices
- Unusual traffic patterns
SIEM Query:
Search for system crash events or network anomalies involving Zephyr devices.