{"id":"UBUNTU-CVE-2020-15522","details":"Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.","modified":"2026-03-19T06:53:13.557944Z","published":"2021-05-20T12:15:00Z","upstream":["CVE-2020-15522"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-15522"},{"type":"REPORT","url":"https://github.com/bcgit/bc-java/wiki/CVE-2020-15522"},{"type":"REPORT","url":"https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522"},{"type":"REPORT","url":"https://www.bouncycastle.org/releasenotes.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-15522"}],"affected":[{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.51-4ubuntu1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.49+dfsg-3ubuntu1","1.51-4ubuntu1","1.51-4ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.51-4ubuntu1+esm1"},{"binary_name":"libbcpg-java","binary_version":"1.51-4ubuntu1+esm1"},{"binary_name":"libbcpkix-java","binary_version":"1.51-4ubuntu1+esm1"},{"binary_name":"libbcprov-java","binary_version":"1.51-4ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-15522.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.59-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.57-1","1.58-1","1.59-1","1.59-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.59-1ubuntu0.1~esm1"},{"binary_name":"libbcpg-java","binary_version":"1.59-1ubuntu0.1~esm1"},{"binary_name":"libbcpkix-java","binary_version":"1.59-1ubuntu0.1~esm1"},{"binary_name":"libbcprov-java","binary_version":"1.59-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-15522.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.61-1ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.61-1","1.61-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.61-1ubuntu0.1~esm1"},{"binary_name":"libbcpg-java","binary_version":"1.61-1ubuntu0.1~esm1"},{"binary_name":"libbcpkix-java","binary_version":"1.61-1ubuntu0.1~esm1"},{"binary_name":"libbcprov-java","binary_version":"1.61-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-15522.json"}}],"schema_version":"1.7.5","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"}]}