Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Eugeny / russh | affected < 0.62.4 |
CWE
CWE-704, CWE-754
References
- https://github.com/Eugeny/russh/security/advisories/GHSA-g9hv-x236-4qp3
- https://github.com/Eugeny/russh/commit/a7fc1eb5717264e31c3c5f7dd849b73989a08f3d
- https://github.com/Eugeny/russh/releases/tag/v0.62.4
ADP enrichment
No English description supplied.