How the CVE Works:
CVE-2025-22907 is a critical stack-based buffer overflow vulnerability in RE11S v1.11 firmware. The flaw exists in the `formWlSiteSurvey` function, where the `selSSID` parameter lacks proper bounds checking. Attackers can craft a maliciously long SSID input, overflowing the stack buffer and potentially executing arbitrary code with elevated privileges. This occurs due to unsafe string copying into a fixed-size buffer without validation, allowing overwriting of return addresses and hijacking program flow.
Exploitation requires sending a specially crafted HTTP POST request to the affected device’s web interface. Successful exploitation could lead to remote code execution (RCE) or denial-of-service (DoS) by crashing the service. The vulnerability is particularly dangerous in default configurations where the web interface is exposed to untrusted networks.
DailyCVE Form:
Platform: RE11S
Version: v1.11
Vulnerability: Stack Overflow
Severity: Critical
Date: 04/09/2025
What Undercode Say:
Exploitation:
- Craft an HTTP POST request with an oversized `selSSID` parameter:
curl -X POST http://<target>/formWlSiteSurvey -d "selSSID=$(python -c 'print("A"500)')" - Use a Metasploit module (if developed) for RCE:
use exploit/linux/http/re11s_stack_overflow set RHOST <target> exploit
Protection:
1. Apply vendor patches for RE11S v1.11+.
2. Disable web interface access from WAN:
iptables -A INPUT -p tcp --dport 80 -j DROP
3. Implement stack canaries and ASLR:
// Compile with protections gcc -fstack-protector-all -pie -fPIE vulnerable.c -o fixed
Detection:
1. Scan for vulnerable devices using Nmap:
nmap -p80 --script http-vuln-cve2025-22907 <target>
2. Monitor logs for oversized SSID payloads:
grep "selSSID=.{100,}" /var/log/httpd.log
Mitigation:
- Deploy a WAF to filter malicious payloads:
location /formWlSiteSurvey { if ($arg_selSSID ~ ".{100,}") { return 403; } } - Use binary hardening tools:
checksec --file=/usr/bin/re11s_firmware
References:
- Vendor advisory: [RE11S-SA-2025-001]
- CWE-121: Stack-based Buffer Overflow
- CVSS 4.0: 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-22907
Extra Source Hub:
Undercode
