{"api_version":"1","generated_at":"2026-04-22T20:52:22+00:00","cve":"CVE-2020-25659","urls":{"html":"https://cve.report/CVE-2020-25659","api":"https://cve.report/api/cve/CVE-2020-25659.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-25659","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-25659"},"summary":{"title":"CVE-2020-25659","description":"python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.","state":"PUBLIC","assigner":"secalert@redhat.com","published_at":"2021-01-11 16:15:00","updated_at":"2023-02-09 02:25:00"},"problem_types":["NVD-CWE-Other"],"metrics":[],"references":[{"url":"https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b","name":"https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b","refsource":"MISC","tags":["Patch","Third Party Advisory"],"title":"Attempt to mitigate Bleichenbacher attacks on RSA decryption by alex · Pull Request #5507 · pyca/cryptography · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","name":"https://www.oracle.com/security-alerts/cpuapr2022.html","refsource":"MISC","tags":[],"title":"Oracle Critical Patch Update Advisory - April 2022","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","name":"N/A","refsource":"N/A","tags":[],"title":"Oracle Critical Patch Update Advisory - July 2022","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-25659","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25659","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"25659","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"oracle","cpe5":"communications_cloud_native_core_network_function_cloud_native_environment","cpe6":"1.10.0","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"25659","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"python-cryptography_project","cpe5":"python-cryptography","cpe6":"3.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"25659","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"python-cryptography_project","cpe5":"python-cryptography","cpe6":"3.2","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-25659","qid":"159194","title":"Oracle Enterprise Linux Security Update for python-cryptography (ELSA-2021-1608)"},{"cve":"CVE-2020-25659","qid":"239330","title":"Red Hat Update for python-cryptography (RHSA-2021:1608)"},{"cve":"CVE-2020-25659","qid":"239580","title":"Red Hat Update for rh-python38 (RHSA-2021:3254)"},{"cve":"CVE-2020-25659","qid":"296069","title":"Oracle Solaris 11.4 Support Repository Update (SRU) 31.88.5 Missing (CPUJAN2021)"},{"cve":"CVE-2020-25659","qid":"377334","title":"Alibaba Cloud Linux Security Update for python-cryptography (ALINUX3-SA-2022:0083)"},{"cve":"CVE-2020-25659","qid":"501474","title":"Alpine Linux Security Update for py3-cryptography"},{"cve":"CVE-2020-25659","qid":"674135","title":"EulerOS Security Update for python-cryptography (EulerOS-SA-2024-1494)"},{"cve":"CVE-2020-25659","qid":"674139","title":"EulerOS Security Update for python-cryptography (EulerOS-SA-2024-1515)"},{"cve":"CVE-2020-25659","qid":"750515","title":"OpenSUSE Security Update for python-cryptography (openSUSE-SU-2020:2173-1)"},{"cve":"CVE-2020-25659","qid":"753738","title":"SUSE Enterprise Linux Security Update for python-cryptography, python-cryptography-vectors (SUSE-SU-2023:0604-1)"},{"cve":"CVE-2020-25659","qid":"754157","title":"SUSE Enterprise Linux Security Update for grpc, protobuf, python-Deprecated, python-PyGithub, python-aiocontextvars, python-avro, python-bcrypt, python-cryptography, python-cryptography-vectors, python-google-api-core, pyt (SUSE-SU-2023:2783-1)"},{"cve":"CVE-2020-25659","qid":"754878","title":"SUSE Enterprise Linux Security Update for grpc, protobuf, python-DEPRECATED, python-PyGithub, python-aiocontextvars, python-avro, python-bcrypt, python-cryptography, python-cryptography-vectors, python-google-api-core, pyt (SUSE-SU-2023:2783-2)"},{"cve":"CVE-2020-25659","qid":"900225","title":"CBL-Mariner Linux Security Update for python-cryptography 2.3.1"},{"cve":"CVE-2020-25659","qid":"903449","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for python-cryptography (3734)"},{"cve":"CVE-2020-25659","qid":"940282","title":"AlmaLinux Security Update for python-cryptography (ALSA-2021:1608)"},{"cve":"CVE-2020-25659","qid":"960766","title":"Rocky Linux Security Update for python-cryptography (RLSA-2021:1608)"},{"cve":"CVE-2020-25659","qid":"983257","title":"Python (pip) Security Update for cryptography (GHSA-hggm-jpg3-v476)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-25659","ASSIGNER":"secalert@redhat.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"python-cryptography","version":{"version_data":[{"version_value":"python-cryptography 3.2"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-385"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b","url":"https://github.com/pyca/cryptography/pull/5507/commits/ce1bef6f1ee06ac497ca0c837fbd1c7ef6c2472b"},{"url":"https://www.oracle.com/security-alerts/cpuapr2022.html","refsource":"MISC","name":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"url":"https://www.oracle.com/security-alerts/cpujul2022.html","refsource":"MISC","name":"https://www.oracle.com/security-alerts/cpujul2022.html"}]},"description":{"description_data":[{"lang":"eng","value":"python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext."}]}},"nvd":{"publishedDate":"2021-01-11 16:15:00","lastModifiedDate":"2023-02-09 02:25:00","problem_types":["NVD-CWE-Other"],"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:python-cryptography_project:python-cryptography:3.2:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:1.10.0:*:*:*:*:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"25659","Ordinal":"187076","Title":"CVE-2020-25659","CVE":"CVE-2020-25659","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"25659","Ordinal":"1","NoteData":"python-cryptography 3.2 is vulnerable to Bleichenbacher timing attacks in the RSA decryption API, via timed processing of valid PKCS#1 v1.5 ciphertext.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"25659","Ordinal":"2","NoteData":"2021-01-11","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"25659","Ordinal":"3","NoteData":"2021-01-11","Type":"Other","Title":"Modified"}]}}}