CVE-2025-25293.yml

---
gem: ruby-saml
cve: 2025-25293
ghsa: 92rq-c8cf-prrq
url: https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq
title: Ruby SAML allows remote Denial of Service (DoS) with compressed SAML responses
date: 2025-03-12
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).
cvss_v3: 7.5
cvss_v4: 8.8
patched_versions:
  - "~> 1.12.4"
  - ">= 1.18.0"
related:
  url:
    - 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/advisories/GHSA-92rq-c8cf-prrq