CVE-2026-73429

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{"affected": [{"affectedData": [{"product": "russh", "vendor": "Eugeny", "versions": [{"status": "affected", "version": "< 0.62.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Russh is a Rust SSH client & server library. Prior to 0.62.4, a malicious SSH server can crash a russh client session with a malformed KEX_ECDH_REPLY containing a server ephemeral value that is not 32 bytes long. The client-side Curve25519Kex::compute_shared_secret function in russh/src/kex/curve25519.rs passes the decoded exchange.server_ephemeral value to clone_from_slice without validating its length, causing a deterministic panic before the server host key is verified. The panic terminates the spawned client session task and surfaces as a JoinError, while the embedding process normally remains running. This issue is fixed in version 0.62.4."}, {"lang": "es", "value": "Russh es una biblioteca de cliente y servidor Rust SSH. Antes de la versi\u00f3n 0.62.4, un servidor SSH malicioso puede bloquear una sesi\u00f3n de cliente de russh con una KEX_ECDH_REPLY malformada que contiene un valor ef\u00edmero del servidor que no tiene 32 bytes de longitud. La funci\u00f3n Curve25519Kex::compute_shared_secret del lado del cliente en russh/src/kex/curve25519.rs pasa el valor exchange.server_ephemeral decodificado a clone_from_slice sin validar su longitud, causando un p\u00e1nico determinista antes de que se verifique la clave de host del servidor. El p\u00e1nico termina la tarea de sesi\u00f3n de cliente generada y se manifiesta como un JoinError, mientras que el proceso de incrustaci\u00f3n normalmente permanece en ejecuci\u00f3n. Este problema est\u00e1 solucionado en la versi\u00f3n 0.62.4."}], "id": "CVE-2026-73429", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-73429", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-14T22:15:11.220092Z", "version": "2.0.3"}}]}, "published": "2026-08-12T21:17:41.750", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/releases/tag/v0.62.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-704"}, {"lang": "en", "value": "CWE-754"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.62.4)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "russh", "source": "cna", "vendor": "Eugeny"}, "product": "russh", "vendor": "eugeny"}], "created": "2026-08-12T23:00:05.002762+00:00", "updated": "2026-08-13T02:30:12.397917+00:00", "vendors": ["eugeny", "eugeny$PRODUCT$russh"]}