CVE-2022-29245

Katalog CVE

CVSS 5.9 · Medium EPSS 1,5%

Kerentanan Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) pada ssh.net project ssh.net. Skor CVSS 3.1 5.9 (Medium) menurut NVD.

Deskripsi (NVD)

SSH.NET is a Secure Shell (SSH) library for .NET. In versions 2020.0.0 and 2020.0.1, during an `X25519` key exchange, the client’s private key is generated with `System.Random`. `System.Random` is not a cryptographically secure random number generator, it must therefore not be used for cryptographic purposes. When establishing an SSH connection to a remote host, during the X25519 key exchange, the private key is generated with a weak random number generator whose seed can be brute forced. This allows an attacker who is able to eavesdrop on the communications to decrypt them. Version 2020.0.2 contains a patch for this issue. As a workaround, one may disable support for `curve25519-sha256` and `curve25519-sha256@libssh.org` key exchange algorithms.

Rincian

Terbit di NVD

31 Mei 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

5.9 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

EPSS (30 hari)

1,5% peluang dieksploitasi; lebih tinggi dari 72,7% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb patch · advisory pihak ketiga
• https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p exploit · mitigasi · advisory pihak ketiga
• https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyE... exploit · advisory pihak ketiga
• https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2 release notes · advisory pihak ketiga