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How CVE-2025-4452 Works
The vulnerability exists in the `formSetWizard2` function of D-Link DIR-619L firmware version 2.04B04. When processing the `curTime` parameter, the function fails to properly validate input length before copying it to a fixed-size buffer. This allows attackers to overwrite adjacent memory regions by sending an excessively long string as the `curTime` value. The overflow occurs in the web management interface, which is accessible remotely. Successful exploitation could lead to arbitrary code execution with root privileges since the web server runs with elevated permissions. The vulnerability is particularly dangerous because it can be triggered without authentication.
DailyCVE Form
Platform: D-Link DIR-619L
Version: 2.04B04
Vulnerability: Buffer Overflow
Severity: Critical
Date: 05/13/2025
What Undercode Say:
Exploitation:
import requests
target = "http://192.168.0.1"
payload = "A" 1024 + "\xde\xad\xbe\xef"
response = requests.post(target+"/formSetWizard2", data={"curTime": payload})
Protection:
1. Disable web administration interface
2. Apply firmware patch if available
3. Block port 80/443 at firewall
Vulnerable code example:
void formSetWizard2(char curTime) {
char buffer[bash];
strcpy(buffer, curTime); // Vulnerable copy
}
Detection command:
nmap -sV --script=http-vuln-cve2025-4452 <target>
Mitigation steps:
1. Segment network to isolate device
2. Monitor for exploit attempts
3. Replace with supported hardware
Debugging crash:
gdb -q /usr/sbin/httpd run -f bt full
Traffic analysis:
http.request.method == "POST" && http.request.uri contains "formSetWizard2"
Memory protection:
echo 1 > /proc/sys/kernel/randomize_va_space
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
