CVE-2021-44144
📋 TL;DR
CVE-2021-44144 is a heap-based buffer over-read vulnerability in Croatia Control Asterix software version 2.8.1. This vulnerability could allow attackers to read sensitive information from memory or potentially cause denial of service. Organizations using Asterix 2.8.1 for air traffic control data processing are affected.
💻 Affected Systems
- Croatia Control Asterix
📦 What is this software?
Asterix by Crocontrol
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data exfiltration, or service disruption in critical air traffic control systems.
Likely Case
Denial of service through application crashes or information disclosure of sensitive memory contents.
If Mitigated
Limited impact with proper network segmentation and memory protection mechanisms in place.
🎯 Exploit Status
Buffer over-read vulnerabilities typically require some technical expertise to exploit effectively.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 2.8.1
Vendor Advisory: https://github.com/CroatiaControlLtd/asterix/issues/183
Restart Required: Yes
Instructions:
1. Check current Asterix version. 2. Upgrade to latest version from official repository. 3. Restart Asterix services. 4. Verify the fix.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Asterix systems from untrusted networks to reduce attack surface.
Memory Protection
linuxEnable ASLR and other memory protection mechanisms at OS level.
sysctl -w kernel.randomize_va_space=2
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to trusted sources only.
- Monitor system logs for abnormal memory access patterns or crashes.
🔍 How to Verify
Check if Vulnerable:
Check Asterix version: asterix --version or examine installed package version.Check Version:
asterix --versionVerify Fix Applied:
Verify version is greater than 2.8.1 and test with known vulnerable payloads if available.📡 Detection & Monitoring
Log Indicators:
- Application crashes
- Memory access violation errors
- Unusual network traffic patterns
Network Indicators:
- Unexpected connections to Asterix ports
- Malformed data packets to Asterix services
SIEM Query:
source="asterix.log" AND ("segmentation fault" OR "buffer over-read" OR "memory violation")