{"id":"BIT-gitlab-2025-25293","summary":"ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses","details":"ruby-saml provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. Prior to versions 1.12.4 and 1.18.0, ruby-saml is susceptible to remote Denial of Service (DoS) with compressed SAML responses. ruby-saml uses zlib to decompress SAML responses in case they're compressed. It is possible to bypass the message size check with a compressed assertion since the message size is checked before inflation and not after. This issue may lead to remote Denial of Service (DoS). Versions 1.12.4 and 1.18.0 fix the issue.","aliases":["CVE-2025-25293","GHSA-92rq-c8cf-prrq"],"modified":"2025-11-06T13:25:46.476Z","published":"2025-04-14T11:55:21.293Z","database_specific":{"cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*","cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*"],"severity":"High"},"references":[{"type":"WEB","url":"https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released"},{"type":"WEB","url":"https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials"},{"type":"WEB","url":"https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a"},{"type":"WEB","url":"https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1"},{"type":"WEB","url":"https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4"},{"type":"WEB","url":"https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0"},{"type":"WEB","url":"https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq"},{"type":"WEB","url":"https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-25293"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20250314-0008/"},{"type":"WEB","url":"https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html"}],"affected":[{"package":{"name":"gitlab","ecosystem":"Bitnami","purl":"pkg:bitnami/gitlab"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"17.9.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/gitlab/BIT-gitlab-2025-25293.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.7.3"}