HIGH7.5
GHSA-92rq-c8cf-prrq
Ruby SAML allows remote Denial of Service (DoS) with compressed SAML responses
Quick fix
GHSA-92rq-c8cf-prrq — ruby-saml: upgrade to the fixed version with the command below.
bundle update ruby-samlDetails
### 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).
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq[WEB]
- https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2025-25293[ADVISORY]
- https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a[WEB]
- https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1[WEB]
- https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released[WEB]
- https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials[WEB]
- https://github.com/SAML-Toolkits/ruby-saml[PACKAGE]
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4[WEB]
- https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0[WEB]
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2025-25293.yml[WEB]
- https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html[WEB]
- https://security.netapp.com/advisory/ntap-20250314-0008[WEB]
- https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml[ADVISORY]