{"id":"UBUNTU-CVE-2020-25659","details":"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.","modified":"2026-02-04T02:42:24.508643Z","published":"2020-10-28T00:00:00Z","related":["USN-4613-1"],"upstream":["CVE-2020-25659"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25659"},{"type":"REPORT","url":"https://github.com/pyca/cryptography/security/advisories/GHSA-hggm-jpg3-v476"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4613-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-25659"}],"affected":[{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@1.2.3-1ubuntu0.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.3-1ubuntu0.3"}]}],"versions":["1.0.1-1ubuntu1","1.0.2-1","1.1-1","1.1.1-1","1.1.1-1ubuntu1","1.1.1-1ubuntu2","1.1.1-1ubuntu3","1.2.2-2","1.2.3-1","1.2.3-1ubuntu0.1","1.2.3-1ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-cryptography","binary_version":"1.2.3-1ubuntu0.3"},{"binary_name":"python3-cryptography","binary_version":"1.2.3-1ubuntu0.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25659.json"}},{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@2.1.4-1ubuntu1.4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.4-1ubuntu1.4"}]}],"versions":["1.9-1","2.1.3-3","2.1.4-1","2.1.4-1build1","2.1.4-1build2","2.1.4-1ubuntu1","2.1.4-1ubuntu1.1","2.1.4-1ubuntu1.2","2.1.4-1ubuntu1.3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-cryptography","binary_version":"2.1.4-1ubuntu1.4"},{"binary_name":"python3-cryptography","binary_version":"2.1.4-1ubuntu1.4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25659.json"}},{"package":{"name":"python-cryptography","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/python-cryptography@2.8-3ubuntu0.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.8-3ubuntu0.1"}]}],"versions":["2.6.1-3.1","2.6.1-4","2.6.1-4ubuntu1","2.8-1ubuntu2","2.8-2","2.8-3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"python-cryptography","binary_version":"2.8-3ubuntu0.1"},{"binary_version":"2.8-3ubuntu0.1","binary_name":"python3-cryptography"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25659.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}