CVE-2026-25061
📋 TL;DR
This vulnerability in tcpflow's wifipcap component allows a 1-byte out-of-bounds write when parsing specially crafted 802.11 management frames with large TIM elements. Attackers could potentially cause denial of service or execute arbitrary code by sending malicious wireless packets. Users running tcpflow versions up to 1.61 for wireless packet analysis are affected.
💻 Affected Systems
- tcpflow
📦 What is this software?
Tcpflow by Digitalcorpora
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise if the 1-byte overflow can be leveraged for memory corruption attacks
Likely Case
Denial of service through application crash or instability when processing malicious wireless frames
If Mitigated
No impact if tcpflow is not used for wireless packet capture or if network filtering blocks malicious 802.11 frames
🎯 Exploit Status
Exploitation requires wireless packet injection capabilities and specific knowledge of 802.11 frame crafting
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://github.com/simsong/tcpflow/security/advisories/GHSA-q5q6-frrv-9rj6
Restart Required: No
Instructions:
No official patch available. Monitor the GitHub advisory for updates and apply patches when released.
🔧 Temporary Workarounds
Disable wireless packet capture
allAvoid using tcpflow for wireless packet analysis until a patch is available
Network segmentation
allIsolate systems running tcpflow from untrusted wireless networks
🧯 If You Can't Patch
- Remove tcpflow from production systems if wireless analysis is not required
- Implement strict network access controls to prevent wireless packet injection attacks
🔍 How to Verify
Check if Vulnerable:
Check tcpflow version: tcpflow --version | grep -i versionCheck Version:
tcpflow --versionVerify Fix Applied:
Verify version is greater than 1.61 when patch becomes available📡 Detection & Monitoring
Log Indicators:
- Application crashes or segmentation faults in tcpflow processes
- Unexpected termination of tcpflow daemons
Network Indicators:
- Malformed 802.11 management frames with unusually large TIM elements
- Wireless packet injection attempts
SIEM Query:
process_name:"tcpflow" AND (event_type:"crash" OR exit_code:139)