{"id":"UBUNTU-CVE-2024-8796","details":"Under the default configuration, Devise-Two-Factor versions \u003e= 2.2.0 & \u003c 6.0.0 generate TOTP shared secrets that are 120 bits instead of the 128-bit minimum defined by RFC 4226. Using a shared secret shorter than the minimum to generate a multi-factor authentication code could make it easier for an attacker to guess the shared secret and generate valid TOTP codes.","modified":"2026-01-30T00:53:07.014593Z","published":"2024-09-17T18:15:00Z","related":["USN-7050-1"],"upstream":["CVE-2024-8796"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-8796"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2024-8796"},{"type":"REPORT","url":"https://github.com/devise-two-factor/devise-two-factor/security/advisories/GHSA-qjxf-mc72-wjr2"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7050-1"}],"affected":[{"package":{"name":"ruby-devise-two-factor","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-devise-two-factor@2.0.0-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0-1","2.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-devise-two-factor","binary_version":"2.0.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-8796.json"}},{"package":{"name":"ruby-devise-two-factor","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-devise-two-factor@3.1.0-2ubuntu0.1~esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.0-2ubuntu0.1~esm1"}]}],"versions":["3.0.3-2","3.1.0-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"ruby-devise-two-factor","binary_version":"3.1.0-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-8796.json"}},{"package":{"name":"ruby-devise-two-factor","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-devise-two-factor@4.0.0-2ubuntu0.1~esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.0-2ubuntu0.1~esm1"}]}],"versions":["3.1.0-2","4.0.0-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"ruby-devise-two-factor","binary_version":"4.0.0-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2024/UBUNTU-CVE-2024-8796.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}