{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.1",
    "cveMetadata": {
        "cveId": "CVE-2025-24356",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2025-01-20T15:18:26.988Z",
        "datePublished": "2025-01-27T17:31:38.541Z",
        "dateUpdated": "2025-01-28T15:39:06.688Z"
    },
    "containers": {
        "cna": {
            "title": "UDP traffic amplification via fastd's fast reconnect feature",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "cweId": "CWE-405",
                            "lang": "en",
                            "description": "CWE-405: Asymmetric Resource Consumption (Amplification)",
                            "type": "CWE"
                        }
                    ]
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "attackVector": "NETWORK",
                        "attackComplexity": "LOW",
                        "attackRequirements": "NONE",
                        "privilegesRequired": "NONE",
                        "userInteraction": "NONE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "NONE",
                        "vulnAvailabilityImpact": "NONE",
                        "subConfidentialityImpact": "NONE",
                        "subIntegrityImpact": "NONE",
                        "subAvailabilityImpact": "LOW",
                        "baseScore": 6.9,
                        "baseSeverity": "MEDIUM",
                        "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",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/neocturne/fastd/security/advisories/GHSA-pggg-vpfv-4rcv",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/neocturne/fastd/security/advisories/GHSA-pggg-vpfv-4rcv"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/1f233bee76b722c0b3f9024f2c39c72e9f7e5843",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/1f233bee76b722c0b3f9024f2c39c72e9f7e5843"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/3940150e801d0c91460491bec32cbcc5bbc89d5f",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/3940150e801d0c91460491bec32cbcc5bbc89d5f"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/5f63fcfc18ae9cad023fa463b152d5e14192b5a8",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/5f63fcfc18ae9cad023fa463b152d5e14192b5a8"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/9df7e516378441d2d17b89f9db5c27c8312d8f12",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/9df7e516378441d2d17b89f9db5c27c8312d8f12"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/c1a07b3f2b9066c3713c68547da700b85d60f4f7",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/c1a07b3f2b9066c3713c68547da700b85d60f4f7"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/ce1b79b12dbfa796743b5f3a50789ade965b7023",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/ce1b79b12dbfa796743b5f3a50789ade965b7023"
                },
                {
                    "name": "https://github.com/neocturne/fastd/commit/d03a0a17347efb5293e42fde7d982781e90f14ef",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/neocturne/fastd/commit/d03a0a17347efb5293e42fde7d982781e90f14ef"
                }
            ],
            "affected": [
                {
                    "vendor": "neocturne",
                    "product": "fastd",
                    "versions": [
                        {
                            "version": "< 23",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2025-01-27T17:31:38.541Z"
            },
            "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."
                }
            ],
            "source": {
                "advisory": "GHSA-pggg-vpfv-4rcv",
                "discovery": "UNKNOWN"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2025-01-28T15:38:54.975943Z",
                                "id": "CVE-2025-24356",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "yes"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2025-01-28T15:39:06.688Z"
                }
            }
        ]
    }
}