{"api_version":"1","generated_at":"2026-07-23T11:43:30+00:00","cve":"CVE-2022-29245","urls":{"html":"https://cve.report/CVE-2022-29245","api":"https://cve.report/api/cve/CVE-2022-29245.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-29245","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-29245"},"summary":{"title":"CVE-2022-29245","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.","state":"PUBLIC","assigner":"security-advisories@github.com","published_at":"2022-05-31 17:15:00","updated_at":"2023-11-07 03:45:00"},"problem_types":["CWE-338"],"metrics":[],"references":[{"url":"https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p","name":"https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p","refsource":"CONFIRM","tags":[],"title":"Weak private key generation · Advisory · sshnet/SSH.NET · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2","name":"https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2","refsource":"MISC","tags":[],"title":"Release 2020.0.2 · sshnet/SSH.NET · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb","name":"https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb","refsource":"MISC","tags":[],"title":"Use cryptographically secure random number generator. · sshnet/SSH.NET@03c6d60 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51","name":"https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51","refsource":"MISC","tags":[],"title":"SSH.NET/KeyExchangeECCurve25519.cs at bc99ada7da3f05f50d9379f2644941d91d5bf05a · sshnet/SSH.NET · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-29245","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-29245","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"29245","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ssh.net_project","cpe5":"ssh.net","cpe6":"2020.0.0","cpe7":"-","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":".net","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"29245","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ssh.net_project","cpe5":"ssh.net","cpe6":"2020.0.0","cpe7":"beta1","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":".net","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"29245","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"ssh.net_project","cpe5":"ssh.net","cpe6":"2020.0.1","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":".net","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"security-advisories@github.com","ID":"CVE-2022-29245","STATE":"PUBLIC","TITLE":"Weak private key generation in SSH.NET"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"SSH.NET","version":{"version_data":[{"version_value":">= 2020.0.0, < 2020.0.2"}]}}]},"vendor_name":"sshnet"}]}},"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"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."}]},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)"}]}]},"references":{"reference_data":[{"name":"https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p","refsource":"CONFIRM","url":"https://github.com/sshnet/SSH.NET/security/advisories/GHSA-72p8-v4hg-v45p"},{"name":"https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb","refsource":"MISC","url":"https://github.com/sshnet/SSH.NET/commit/03c6d60736b8f7b42e44d6989a53f9b644a091fb"},{"name":"https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51","refsource":"MISC","url":"https://github.com/sshnet/SSH.NET/blob/bc99ada7da3f05f50d9379f2644941d91d5bf05a/src/Renci.SshNet/Security/KeyExchangeECCurve25519.cs#L51"},{"name":"https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2","refsource":"MISC","url":"https://github.com/sshnet/SSH.NET/releases/tag/2020.0.2"}]},"source":{"advisory":"GHSA-72p8-v4hg-v45p","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2022-05-31 17:15:00","lastModifiedDate":"2023-11-07 03:45:00","problem_types":["CWE-338"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.2,"impactScore":3.6},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:P/I:N/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"PARTIAL","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ssh.net_project:ssh.net:2020.0.0:beta1:*:*:*:.net:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ssh.net_project:ssh.net:2020.0.1:*:*:*:*:.net:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:ssh.net_project:ssh.net:2020.0.0:-:*:*:*:.net:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}