saml-toolkits/ruby-saml · Security
Ruby SAML allows remote Denial of Service (DoS) with compressed SAML responses
- GHSA ID
- GHSA-92rq-c8cf-prrq
- CVE ID
- CVE-2025-25293
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS v4
- 7.7 · 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
Description
Summary
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.
Impact
This issue may lead to remote Denial of Service (DoS).
CWEs
- CWE-400 · Uncontrolled Resource Consumption
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq ↗
- https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a ↗
- https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-25293 ↗
- https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1 ↗
- https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released ↗
- https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials ↗
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4 ↗
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0 ↗
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2025-25293.yml ↗
- https://security.netapp.com/advisory/ntap-20250314-0008 ↗
- https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml ↗
- https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html ↗
- https://github.com/advisories/GHSA-92rq-c8cf-prrq ↗