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CVE-2022-29245
Detail
Modified
This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
Current Description
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.
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.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.
NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.
Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.
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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
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 a
Initial Analysis by NIST6/14/2022 6:39:27 PM
Action
Type
Old Value
New Value
Added
CPE Configuration
OR
*cpe:2.3:a:ssh.net_project:ssh.net:2020.0.0:-:*:*:*:.net:*:*
*cpe:2.3:a:ssh.net_project:ssh.net:2020.0.0:beta1:*:*:*:.net:*:*
*cpe:2.3:a:ssh.net_project:ssh.net:2020.0.1:*:*:*:*:.net:*:*
Added
CVSS V2
NIST (AV:N/AC:M/Au:N/C:P/I:N/A:N)
Added
CVSS V3.1
NIST AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Changed
Reference Type
https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51 No Types Assigned
https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51 Exploit, Third Party Advisory
Changed
Reference Type
https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb No Types Assigned
https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb Patch, Third Party Advisory
Changed
Reference Type
https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2 No Types Assigned
https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2 Release Notes, Third Party Advisory
Changed
Reference Type
https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p No Types Assigned
https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p Exploit, Mitigation, Third Party Advisory
Quick Info
CVE Dictionary Entry: CVE-2022-29245 NVD
Published Date: 05/31/2022 NVD
Last Modified: 11/06/2023
Source: GitHub, Inc.