CVE-2024-22654
📋 TL;DR
CVE-2024-22654 is an infinite loop vulnerability in tcpreplay's tcprewrite function that can cause denial of service. Attackers can craft malicious packet capture files that trigger the infinite loop when processed by tcprewrite, potentially causing resource exhaustion. This affects systems running tcpreplay v4.4.4 for network testing or packet manipulation tasks.
💻 Affected Systems
- tcpreplay
📦 What is this software?
Tcpreplay by Broadcom
⚠️ Risk & Real-World Impact
Worst Case
Complete system resource exhaustion leading to denial of service, potentially requiring system reboot if tcprewrite consumes all CPU resources.
Likely Case
tcprewrite process hangs indefinitely consuming CPU cycles, requiring manual termination of the process.
If Mitigated
Process monitoring detects abnormal resource usage and terminates the hanging process automatically.
🎯 Exploit Status
Proof of concept available in GitHub issues. Exploitation requires ability to feed malicious pcap file to tcprewrite.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v4.4.5
Vendor Advisory: https://github.com/appneta/tcpreplay/issues/827
Restart Required: No
Instructions:
1. Download tcpreplay v4.4.5 from official repository. 2. Uninstall current version. 3. Install v4.4.5 using package manager or from source. 4. Verify installation with 'tcpreplay --version'.
🔧 Temporary Workarounds
Input validation for pcap files
allValidate pcap files before processing with tcprewrite using external tools
capinfos -c input.pcap
tcpdump -r input.pcap -c 1
Resource limiting
linuxRun tcprewrite with CPU time limits to prevent indefinite resource consumption
timeout 30 tcprewrite [options] input.pcap
ulimit -t 30
🧯 If You Can't Patch
- Implement strict access controls on who can run tcprewrite and with what files
- Monitor tcprewrite processes for abnormal CPU usage patterns and implement automated termination
🔍 How to Verify
Check if Vulnerable:
Run 'tcpreplay --version' and check if output contains '4.4.4'Check Version:
tcpreplay --versionVerify Fix Applied:
Run 'tcpreplay --version' and confirm version is 4.4.5 or higher📡 Detection & Monitoring
Log Indicators:
- tcprewrite processes running for abnormally long durations
- High CPU usage by tcprewrite processes
Network Indicators:
- N/A - local vulnerability
SIEM Query:
process_name="tcprewrite" AND cpu_usage>90% AND duration>300s