CVE-2024-34034
📋 TL;DR
CVE-2024-34034 is a denial-of-service vulnerability in FlexRIC 2.0.0 where sending a high volume of E42 Subscription Requests causes the Near-RT RIC component to crash due to an assertion error. This affects organizations using FlexRIC 2.0.0 for Open RAN implementations. The vulnerability allows attackers to disrupt RAN intelligent controller functionality.
💻 Affected Systems
- FlexRIC
⚠️ 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 service disruption of the Near-RT RIC component, potentially affecting radio network management and optimization functions in Open RAN deployments.
Likely Case
Service outage of the Near-RT RIC requiring restart, disrupting RAN optimization and management functions temporarily.
If Mitigated
Minimal impact if rate limiting or network segmentation prevents attackers from reaching the vulnerable component.
🎯 Exploit Status
Exploitation requires sending high volume of E42 Subscription Requests to trigger assertion error. No authentication needed if network access is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Monitor FlexRIC repository for security updates. 2. Consider upgrading to future versions when patches are released. 3. No official patch exists as of current information.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict network access to Near-RT RIC component to only trusted management networks
iptables -A INPUT -p tcp --dport [RIC_PORT] -s [TRUSTED_NETWORK] -j ACCEPT
iptables -A INPUT -p tcp --dport [RIC_PORT] -j DROP
Rate Limiting
linuxImplement rate limiting on E42 interface to prevent flood attacks
iptables -A INPUT -p tcp --dport [RIC_PORT] -m limit --limit 10/second --limit-burst 20 -j ACCEPT
iptables -A INPUT -p tcp --dport [RIC_PORT] -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to isolate Near-RT RIC from untrusted networks
- Deploy monitoring and alerting for abnormal E42 Subscription Request patterns
🔍 How to Verify
Check if Vulnerable:
Check FlexRIC version: grep -r 'FLEXRIC_VERSION' /path/to/flexric/installation or check build configurationCheck Version:
Check application logs or configuration files for version 2.0.0Verify Fix Applied:
Test with controlled E42 Subscription Request flood to verify component stability📡 Detection & Monitoring
Log Indicators:
- High frequency of E42 Subscription Requests
- Near-RT RIC crash logs with assertion errors
- Service restart patterns
Network Indicators:
- Unusual volume of E42 protocol traffic to Near-RT RIC
- Traffic from unexpected sources to RIC ports
SIEM Query:
source="flexric.logs" AND ("assertion error" OR "subscription request flood" OR "service crash")