CVE-2024-7537
📋 TL;DR
This vulnerability in oFono's QMI SMS handling allows local attackers to read beyond allocated buffer boundaries, potentially disclosing sensitive information. Attackers could combine this with other vulnerabilities to execute arbitrary code as root. Systems running vulnerable oFono installations are affected.
💻 Affected Systems
- oFono
📦 What is this software?
Ofono by Ofono Project
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation to root leading to complete system compromise via arbitrary code execution
Likely Case
Information disclosure of sensitive memory contents, potentially including credentials or other system data
If Mitigated
Limited information disclosure with no privilege escalation due to proper isolation and security controls
🎯 Exploit Status
Requires local access and may need to be combined with other vulnerabilities for full exploitation
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version with fix for ZDI-CAN-23157 (check vendor advisory)
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-24-1077/
Restart Required: Yes
Instructions:
1. Check oFono vendor advisory for patched version
2. Update oFono to the latest patched version
3. Restart oFono services
4. Verify the fix is applied
🔧 Temporary Workarounds
Disable SMS functionality
linuxTemporarily disable SMS message processing in oFono if not required
systemctl stop ofono
Disable SMS in oFono configuration
Restrict local access
linuxLimit local user access to systems running oFono
Implement strict user access controls
Use SELinux/AppArmor to restrict oFono processes
🧯 If You Can't Patch
- Isolate affected systems from critical networks
- Implement strict monitoring for unusual oFono process behavior
🔍 How to Verify
Check if Vulnerable:
Check oFono version and compare against patched versions in vendor advisoryCheck Version:
ofonod --version or check package manager (apt list --installed | grep ofono)Verify Fix Applied:
Verify oFono version is updated to patched version and restart services📡 Detection & Monitoring
Log Indicators:
- Unusual oFono process crashes
- SMS processing errors in oFono logs
- Memory access violation logs
Network Indicators:
- Unusual SMS traffic patterns to/from affected systems
SIEM Query:
Process:ofonod AND (EventID:1000 OR "segmentation fault" OR "out of bounds")