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.
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History
No history.
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2022-05-31T16:35:11
Updated: 2024-08-03T06:17:54.539Z
Reserved: 2022-04-13T00:00:00
Link: CVE-2022-29245
Vulnrichment
No data.
NVD
Status : Modified
Published: 2022-05-31T17:15:07.837
Modified: 2024-11-21T06:58:47.797
Link: CVE-2022-29245
Redhat
No data.