{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-4239","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","state":"PUBLISHED","assignerShortName":"Go","dateReserved":"2022-07-29T20:06:51.345Z","datePublished":"2022-12-27T21:13:53.590Z","dateUpdated":"2025-04-14T16:59:43.688Z"},"containers":{"cna":{"providerMetadata":{"orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","shortName":"Go","dateUpdated":"2023-06-12T19:04:19.549Z"},"title":"Weak encryption and denial of service in github.com/flynn/noise","descriptions":[{"lang":"en","value":"The Noise protocol implementation suffers from weakened cryptographic security after encrypting 2^64 messages, and a potential denial of service attack. After 2^64 (~18.4 quintillion) messages are encrypted with the Encrypt function, the nonce counter will wrap around, causing multiple messages to be encrypted with the same key and nonce. In a separate issue, the Decrypt function increments the nonce state even when it fails to decrypt a message. If an attacker can provide an invalid input to the Decrypt function, this will cause the nonce state to desynchronize between the peers, resulting in a failure to encrypt all subsequent messages."}],"affected":[{"vendor":"github.com/flynn/noise","product":"github.com/flynn/noise","collectionURL":"https://pkg.go.dev","packageName":"github.com/flynn/noise","versions":[{"version":"0","lessThan":"1.0.0","status":"affected","versionType":"semver"}],"programRoutines":[{"name":"CipherState.Encrypt"},{"name":"CipherState.Decrypt"},{"name":"symmetricState.EncryptAndHash"},{"name":"HandshakeState.ReadMessage"},{"name":"HandshakeState.WriteMessage"},{"name":"symmetricState.DecryptAndHash"}],"defaultStatus":"unaffected"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE 400: Uncontrolled Resource Consumption"}]}],"references":[{"url":"https://github.com/flynn/noise/pull/44"},{"url":"https://pkg.go.dev/vuln/GO-2022-0425"}]},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T17:23:10.118Z"},"title":"CVE Program Container","references":[{"url":"https://github.com/flynn/noise/pull/44","tags":["x_transferred"]},{"url":"https://pkg.go.dev/vuln/GO-2022-0425","tags":["x_transferred"]}]},{"metrics":[{"cvssV3_1":{"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:H/A:N","integrityImpact":"HIGH","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2025-04-14T16:59:11.062582Z","id":"CVE-2021-4239","options":[{"Exploitation":"none"},{"Automatable":"no"},{"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":"2025-04-14T16:59:43.688Z"}}]}}