DEBIAN-CVE-2026-73430
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-73430
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73430.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-73430
- Upstream
- Published
- 2026-08-12T21:17:41Z
- Modified
- 2026-10-14T16:00:11Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- [none]
- Details
-
Russh is a Rust SSH client & server library. Prior to 0.62.4, an unauthenticated SSH client can cause a denial of service by sending SSH_MSG_KEX_ECDH_INIT with a 32-byte all-zero Q_C value. Curve25519Kex::server_dh in russh/src/kex/curve25519.rs accepts the all-zero peer public value and computes an all-zero shared secret, after which compute_exchange_hash calls encode_mpint in russh/src/kex/mod.rs and indexes beyond the end of the input while skipping leading zero bytes. The resulting panic occurs before authentication and terminates the server key-exchange task. This issue is fixed in version 0.62.4.
- References
Affected packages
Debian:14 / rust-russh
Package
- Name
- rust-russh
- Purl
- pkg:deb/debian/rust-russh?arch=source&distro=forky