CVE-2025-25293
Publication date 12 March 2025
Last updated 3 April 2025
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| ruby-saml | 24.10 oracular |
Fixed 1.15.0-1ubuntu0.24.10.2
|
| 24.04 LTS noble |
Fixed 1.15.0-1ubuntu0.24.04.1+esm1
|
|
| 22.04 LTS jammy |
Fixed 1.13.0-1ubuntu0.1+esm1
|
|
| 20.04 LTS focal |
Fixed 1.11.0-1ubuntu0.1+esm1
|
|
| 18.04 LTS bionic |
Fixed 1.7.2-1ubuntu0.1~esm2
|
|
| 16.04 LTS xenial |
Fixed 1.1.2-1ubuntu1+esm2
|
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Related Ubuntu Security Notices (USN)
- USN-7409-1
- RubySAML vulnerabilities
- 2 April 2025
Other references
- https://www.cve.org/CVERecord?id=CVE-2025-25293
- 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/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
- https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a
- https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1
- 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/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq