{"id":"UBUNTU-CVE-2025-66567","details":"The ruby-saml library is for implementing the client side of a SAML authorization. ruby-saml versions up to and including 1.12.4 contain an authentication bypass vulnerability due to an incomplete fix for CVE-2025-25292. ReXML and Nokogiri parse XML differently, generating entirely different document structures from the same input. This allows an attacker to execute a Signature Wrapping attack. This issue is fixed in version 1.18.0.","modified":"2026-01-20T19:11:46.116224Z","published":"2025-12-09T16:18:00Z","upstream":["CVE-2025-66567"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-66567"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-66567"},{"type":"REPORT","url":"https://github.com/SAML-Toolkits/ruby-saml/commit/e9c1cdbd0f9afa467b585de279db0cbd0fb8ae97"},{"type":"REPORT","url":"https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-9v8j-x534-2fx3"},{"type":"REPORT","url":"https://github.com/advisories/GHSA-754f-8gm6-c4r2"}],"affected":[{"package":{"name":"ruby-saml","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ruby-saml@1.1.2-1ubuntu1+esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.2-1","1.0.0-1","1.1.2-1ubuntu1","1.1.2-1ubuntu1+esm1","1.1.2-1ubuntu1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-saml","binary_version":"1.1.2-1ubuntu1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66567.json"}},{"package":{"name":"ruby-saml","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ruby-saml@1.7.2-1ubuntu0.1~esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1","1.7.2-1","1.7.2-1ubuntu0.1~esm1","1.7.2-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-saml","binary_version":"1.7.2-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66567.json"}},{"package":{"name":"ruby-saml","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/ruby-saml@1.11.0-1ubuntu0.1+esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.2-1","1.11.0-1","1.11.0-1ubuntu0.1","1.11.0-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-saml","binary_version":"1.11.0-1ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66567.json"}},{"package":{"name":"ruby-saml","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/ruby-saml@1.13.0-1ubuntu0.1+esm1?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0-1","1.13.0-1","1.13.0-1ubuntu0.1","1.13.0-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-saml","binary_version":"1.13.0-1ubuntu0.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66567.json"}},{"package":{"name":"ruby-saml","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/ruby-saml@1.15.0-1ubuntu0.24.04.1+esm1?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.0-1","1.15.0-1ubuntu0.24.04.1","1.15.0-1ubuntu0.24.04.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"ruby-saml","binary_version":"1.15.0-1ubuntu0.24.04.1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66567.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}