CVE-2025-7432
📋 TL;DR
This vulnerability in Silicon Labs Series 2 devices allows attackers to perform Differential Power Analysis (DPA) attacks to extract cryptographic keys when DPA countermeasures aren't properly reseeded. This affects IoT devices and embedded systems using these chips for secure operations. The vulnerability requires physical access or control of the device to execute the attack.
💻 Affected Systems
- Silicon Labs Series 2 devices (EFR32xG21, EFR32xG22, EFR32xG23, EFR32xG24 families)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete extraction of all cryptographic secrets stored on the device, compromising device identity, secure communications, and protected data.
Likely Case
Extraction of specific cryptographic keys used for device authentication or secure communications, enabling device impersonation or data decryption.
If Mitigated
Limited key exposure if proper physical security controls prevent attacker access to the device hardware.
🎯 Exploit Status
Exploitation requires specialized equipment for power analysis, physical device access, and cryptographic expertise. Not a remote vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Silicon Labs security advisory for specific firmware versions
Vendor Advisory: https://community.silabs.com/068Vm00000b9fBW
Restart Required: Yes
Instructions:
1. Check Silicon Labs security advisory for affected devices. 2. Download updated firmware from Silicon Labs. 3. Flash updated firmware to affected devices. 4. Verify firmware version after update.
🔧 Temporary Workarounds
Physical Security Controls
allImplement strict physical access controls to prevent unauthorized physical access to devices
Key Rotation
allRegularly rotate cryptographic keys to limit exposure window if keys are extracted
🧯 If You Can't Patch
- Implement tamper-evident enclosures and physical security monitoring
- Deploy devices in physically secure locations with access controls
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Silicon Labs security advisory. Devices with unpatched Series 2 firmware are vulnerable.Check Version:
Device-specific command via Silicon Labs development tools or device management interfaceVerify Fix Applied:
Verify firmware version matches or exceeds the patched version specified in Silicon Labs advisory.📡 Detection & Monitoring
Log Indicators:
- Physical tampering alerts
- Unexpected device resets during cryptographic operations
Network Indicators:
- None - this is a physical side-channel attack
SIEM Query:
Not applicable - physical attack detection requires physical security monitoring