{"id":"UBUNTU-CVE-2020-25657","details":"A flaw was found in all released versions of m2crypto, where they are vulnerable to Bleichenbacher timing attacks in the RSA decryption API via the timed processing of valid PKCS#1 v1.5 Ciphertext. The highest threat from this vulnerability is to confidentiality.","modified":"2026-01-20T17:14:55.286386Z","published":"2021-01-12T15:15:00Z","upstream":["CVE-2020-25657"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-25657"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1889823"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-25657"}],"affected":[{"package":{"name":"m2crypto","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.21.1-3ubuntu5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.1-3ubuntu3","0.21.1-3ubuntu4","0.21.1-3ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.21.1-3ubuntu5","binary_name":"python-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.22.6~rc4-1ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.21.1-3ubuntu5","0.22.6~rc4-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.22.6~rc4-1ubuntu1","binary_name":"python-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.27.0-5?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.0-2","0.27.0-2","0.27.0-4","0.27.0-4build1","0.27.0-5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.27.0-5","binary_name":"python-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.31.0-9ubuntu1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.31.0-6","0.31.0-6build1","0.31.0-7","0.31.0-8","0.31.0-9ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.31.0-9ubuntu1","binary_name":"python3-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.38.0-1ubuntu5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.37.1-1ubuntu3","0.37.1-1ubuntu4","0.38.0-1ubuntu3","0.38.0-1ubuntu5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.38.0-1ubuntu5","binary_name":"python3-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/m2crypto@0.40.1-2ubuntu1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.38.0-4build1","0.38.0-4.1","0.40.1-0ubuntu1","0.40.1-1","0.40.1-2build1","0.40.1-2build2","0.40.1-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.40.1-2ubuntu1","binary_name":"python3-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.json"}},{"package":{"name":"m2crypto","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/m2crypto@0.42.0-3?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.42.0-2.1build1","0.42.0-3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.42.0-3","binary_name":"python3-m2crypto"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-25657.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":"low"}]}