{"id":"UBUNTU-CVE-2020-28052","details":"An issue was discovered in Legion of the Bouncy Castle BC Java 1.65 and 1.66. The OpenBSDBCrypt.checkPassword utility method compared incorrect data when checking the password, allowing incorrect passwords to indicate they were matching with previously hashed ones that were different.","modified":"2026-03-07T01:43:23.486005Z","published":"2020-12-18T01:15:00Z","withdrawn":"2026-03-04T04:53:18Z","upstream":["CVE-2020-28052"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-28052"},{"type":"REPORT","url":"https://github.com/bcgit/bc-java/wiki/CVE-2020-28052"},{"type":"REPORT","url":"https://www.synopsys.com/blogs/software-security/cve-2020-28052-bouncy-castle/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-28052"}],"affected":[{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.51-4ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.49+dfsg-3ubuntu1","1.51-4ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.51-4ubuntu1"},{"binary_name":"libbcpg-java","binary_version":"1.51-4ubuntu1"},{"binary_name":"libbcpkix-java","binary_version":"1.51-4ubuntu1"},{"binary_name":"libbcprov-java","binary_version":"1.51-4ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.59-1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.57-1","1.58-1","1.59-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.59-1"},{"binary_name":"libbcpg-java","binary_version":"1.59-1"},{"binary_name":"libbcpkix-java","binary_version":"1.59-1"},{"binary_name":"libbcprov-java","binary_version":"1.59-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.61-1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.61-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.61-1"},{"binary_name":"libbcpg-java","binary_version":"1.61-1"},{"binary_name":"libbcpkix-java","binary_version":"1.61-1"},{"binary_name":"libbcprov-java","binary_version":"1.61-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.68-5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.68-2","1.68-4","1.68-5"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcmail-java","binary_version":"1.68-5"},{"binary_name":"libbcpg-java","binary_version":"1.68-5"},{"binary_name":"libbcpkix-java","binary_version":"1.68-5"},{"binary_name":"libbcprov-java","binary_version":"1.68-5"},{"binary_name":"libbctls-java","binary_version":"1.68-5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/bouncycastle@1.77-1?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.72-2","1.77-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcjmail-java","binary_version":"1.77-1"},{"binary_name":"libbcmail-java","binary_version":"1.77-1"},{"binary_name":"libbcpg-java","binary_version":"1.77-1"},{"binary_name":"libbcpkix-java","binary_version":"1.77-1"},{"binary_name":"libbcprov-java","binary_version":"1.77-1"},{"binary_name":"libbctls-java","binary_version":"1.77-1"},{"binary_name":"libbcutil-java","binary_version":"1.77-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.json"}},{"package":{"name":"bouncycastle","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/bouncycastle@1.80-3?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.77-1","1.80-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libbcjmail-java","binary_version":"1.80-3"},{"binary_name":"libbcmail-java","binary_version":"1.80-3"},{"binary_name":"libbcpg-java","binary_version":"1.80-3"},{"binary_name":"libbcpkix-java","binary_version":"1.80-3"},{"binary_name":"libbcprov-java","binary_version":"1.80-3"},{"binary_name":"libbctls-java","binary_version":"1.80-3"},{"binary_name":"libbcutil-java","binary_version":"1.80-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-28052.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:H/A:H"},{"type":"Ubuntu","score":"medium"}]}