CVE-2025-24356

{"id": "CVE-2025-24356", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 6.9, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2025-01-27T18:15:41.347", "references": [{"url": "https://github.com/neocturne/fastd/commit/1f233bee76b722c0b3f9024f2c39c72e9f7e5843", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/3940150e801d0c91460491bec32cbcc5bbc89d5f", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/5f63fcfc18ae9cad023fa463b152d5e14192b5a8", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/9df7e516378441d2d17b89f9db5c27c8312d8f12", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/c1a07b3f2b9066c3713c68547da700b85d60f4f7", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/ce1b79b12dbfa796743b5f3a50789ade965b7023", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/commit/d03a0a17347efb5293e42fde7d982781e90f14ef", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/neocturne/fastd/security/advisories/GHSA-pggg-vpfv-4rcv", "tags": ["Patch", "Vendor Advisory", "Mitigation"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-405"}]}], "descriptions": [{"lang": "en", "value": "fastd is a VPN daemon which tunnels IP packets and Ethernet frames over UDP. When receiving a data packet from an unknown IP address/port combination, fastd will assume that one of its connected peers has moved to a new address and initiate a reconnect by sending a handshake packet. This \"fast reconnect\" avoids having to wait for a session timeout (up to ~90s) until a new connection is established. Even a 1-byte UDP packet just containing the fastd packet type header can trigger a much larger handshake packet (~150 bytes of UDP payload). Including IPv4 and UDP headers, the resulting amplification factor is roughly 12-13. By sending data packets with a spoofed source address to fastd instances reachable on the internet, this amplification of UDP traffic might be used to facilitate a Distributed Denial of Service attack. This vulnerability is fixed in v23."}, {"lang": "es", "value": "fastd es una VPN daemon que tuneliza paquetes IP y tramas Ethernet sobre UDP. Al recibir un paquete de datos de una combinaci\u00f3n desconocida de direcci\u00f3n IP/puerto, fastd asumir\u00e1 que uno de sus pares conectados se ha mudado a una nueva direcci\u00f3n e iniciar\u00e1 una reconexi\u00f3n enviando un paquete handshake. Esta \"reconexi\u00f3n r\u00e1pida\" evita tener que esperar a que se agote el tiempo de espera de la sesi\u00f3n (hasta ~90 s) hasta que se establezca una nueva conexi\u00f3n. Incluso un paquete UDP de 1 byte que solo contenga el encabezado de tipo de paquete fastd puede activar un paquete handshakee mucho m\u00e1s grande (~150 bytes de UDP payload). incluida IPv4 y encabezados UDP, el factor de amplificaci\u00f3n resultante es aproximadamente 12-13. Al enviar paquetes de datos con una direcci\u00f3n de origen falsificada a instancias de fastd accesibles en Internet, esta amplificaci\u00f3n del tr\u00e1fico UDP podr\u00eda usarse para facilitar un ataque de denegaci\u00f3n de servicio distribuido. Esta vulnerabilidad se corrigi\u00f3 en la v23."}], "lastModified": "2025-08-27T02:15:55.160", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:fastd_project:fastd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13F48C42-FD6C-4BB0-ACB5-56235C3E04B1", "versionEndExcluding": "23.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}