CVE-2026-73429
CVE-2026-73429 · Russh: client wrong-length X25519 `clone_from_slice` panic (pre-auth DoS)
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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.
CVSS 5.3 · Media · EPSS 0,5% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: system
Productos y versiones afectados
russh
- Versiones
- < 0.62.4: Afectada
Sin corrección publicada
rust-russh Debian:14
- Versiones
- 0.57.1-1
- 0.57.1-2
- Intervalos de versiones afectados
- ECOSYSTEM: < 0.64.1-1
Actualiza a 0.64.1-1
rust-russh Ubuntu:26.10
- Versiones
- 0.57.1-2
- Intervalos de versiones afectados
- ECOSYSTEM: (−∞, +∞)
Sin corrección publicada