{"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"}}]}}