{"id":"UBUNTU-CVE-2019-25025","details":"The activerecord-session_store (aka Active Record Session Store) component through 1.1.3 for Ruby on Rails does not use a constant-time approach when delivering information about whether a guessed session ID is valid. Consequently, remote attackers can leverage timing discrepancies to achieve a correct guess in a relatively short amount of time. This is a related issue to CVE-2019-16782.","modified":"2025-10-24T04:48:10Z","published":"2021-03-05T06:15:00Z","upstream":["CVE-2019-25025"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-25025"},{"type":"REPORT","url":"https://github.com/rails/activerecord-session_store/pull/151"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-25025"}],"affected":[{"package":{"name":"ruby-activerecord-session-store","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-activerecord-session-store@0.1.1-3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.1-2","0.1.1-3"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-activerecord-session-store","binary_version":"0.1.1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-25025.json"}},{"package":{"name":"ruby-activerecord-session-store","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-activerecord-session-store@1.0.0-2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-activerecord-session-store","binary_version":"1.0.0-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-25025.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}