CVE-2022-27416
📋 TL;DR
CVE-2022-27416 is a double-free vulnerability in Tcpreplay v4.4.1 that allows attackers to execute arbitrary code or cause denial of service by exploiting memory corruption. This affects systems running vulnerable versions of Tcpreplay, particularly those processing untrusted packet capture files. Security teams and network administrators using Tcpreplay for packet analysis or testing are at risk.
💻 Affected Systems
- Tcpreplay
📦 What is this software?
Tcpreplay by Broadcom
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or persistent backdoor installation.
Likely Case
Application crash causing denial of service during packet replay operations, potentially disrupting network testing or analysis workflows.
If Mitigated
Limited impact with proper sandboxing and privilege separation, potentially just application termination without system compromise.
🎯 Exploit Status
Exploitation requires crafting malicious packet capture files and getting them processed by Tcpreplay. The double-free vulnerability in __interceptor_free makes reliable exploitation challenging but possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.4.2 and later
Vendor Advisory: https://github.com/appneta/tcpreplay/issues/702
Restart Required: No
Instructions:
1. Download latest Tcpreplay from official repository. 2. Compile and install following standard build procedures. 3. Replace existing Tcpreplay binary with patched version.
🔧 Temporary Workarounds
Restrict file processing
allLimit Tcpreplay to process only trusted packet capture files from verified sources.
Run with reduced privileges
linuxExecute Tcpreplay with non-root user privileges to limit potential damage from exploitation.
sudo -u nobody tcpreplay [options]
🧯 If You Can't Patch
- Isolate Tcpreplay usage to dedicated testing environments with no access to production systems
- Implement strict input validation for all packet capture files processed by Tcpreplay
🔍 How to Verify
Check if Vulnerable:
Check Tcpreplay version: tcpreplay --version | grep '4.4.1'Check Version:
tcpreplay --versionVerify Fix Applied:
Verify version is 4.4.2 or higher: tcpreplay --version📡 Detection & Monitoring
Log Indicators:
- Segmentation fault or crash logs from Tcpreplay process
- Unexpected memory allocation errors in system logs
Network Indicators:
- Unusual network traffic patterns if Tcpreplay is used for replaying packets in production
SIEM Query:
process_name:"tcpreplay" AND (event_type:"crash" OR exit_code:139)