CVE-2017-12472
📋 TL;DR
CVE-2017-12472 is a NULL pointer dereference vulnerability in CCN-lite's ccnl-ext-mgmt.c component that occurs when ccnl_malloc fails to allocate memory but the return value isn't checked. This allows attackers to potentially crash the application or execute arbitrary code. Anyone using CCN-lite versions before 2.00 is affected.
💻 Affected Systems
- CCN-lite
📦 What is this software?
Ccn Lite by Ccn Lite
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or service disruption.
Likely Case
Application crash causing denial of service and potential memory corruption.
If Mitigated
Limited impact with proper memory protection mechanisms and exploit mitigations in place.
🎯 Exploit Status
While no public exploit exists, the NULL pointer dereference with high CVSS score suggests exploitation is feasible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.0
Vendor Advisory: https://github.com/cn-uofbasel/ccn-lite/releases/tag/2.0.0
Restart Required: Yes
Instructions:
1. Download CCN-lite 2.0.0 or later from GitHub. 2. Stop all CCN-lite services. 3. Replace existing installation with patched version. 4. Restart services.
🔧 Temporary Workarounds
Memory protection hardening
linuxEnable ASLR and other memory protection mechanisms to reduce exploit success
echo 2 > /proc/sys/kernel/randomize_va_space
🧯 If You Can't Patch
- Network segmentation to isolate CCN-lite instances from untrusted networks
- Implement strict access controls and monitor for abnormal process crashes
🔍 How to Verify
Check if Vulnerable:
Check CCN-lite version: if version < 2.0.0, system is vulnerableCheck Version:
ccn-lite-ccnb -v 2>&1 | grep -i versionVerify Fix Applied:
Confirm version is 2.0.0 or higher and check that ccnl-ext-mgmt.c contains NULL pointer checks after ccnl_malloc calls📡 Detection & Monitoring
Log Indicators:
- Segmentation fault errors
- Unexpected process termination
- Memory access violation logs
Network Indicators:
- Abnormal CCN protocol traffic patterns
- Unexpected connection attempts to CCN-lite ports
SIEM Query:
process_name:"ccn-lite" AND (event_type:"crash" OR error_message:"segmentation fault")