CVE-2025-66568
Ruby-saml allows a Libxml2 Canonicalization error to bypass Digest/Signature validation
Severidad por fuente
La etiqueta propia de Trivy es CRITICAL. Crítica según NVD, GHSA, Ruby Advisory DB.
Descripción
The ruby-saml library implements the client side of an SAML authorization. Versions up to and including 1.12.4, are vulnerable to authentication bypass through the libxml2 canonicalization process used by Nokogiri for document transformation, which allows an attacker to execute a Signature Wrapping attack. When libxml2’s canonicalization is invoked on an invalid XML input, it may return an empty string rather than a canonicalized node. ruby-saml then proceeds to compute the DigestValue over this empty string, treating it as if canonicalization succeeded. This issue is fixed in version 1.18.0.
Paquetes afectados y versiones corregidas
| Fuente | Paquete | Corregido en |
|---|---|---|
| rubygems::GitHub Security Advisory RubyGems | ruby-saml | 1.18.0 |
| rubygems::Ruby Advisory Database | ruby-saml | >= 1.18.0 |
| rapidfort ubuntu 20.04 | ruby-saml | sin corrección indicada |
| rapidfort ubuntu 22.04 | ruby-saml | sin corrección indicada |
| rapidfort ubuntu 24.04 | ruby-saml | sin corrección indicada |
Referencias
- https://github.com/SAML-Toolkits/ruby-saml
- https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a
- https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-x4h9-gwv3-r4m4
- https://github.com/advisories/GHSA-x4h9-gwv3-r4m4
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2025-66568.yml
- https://nvd.nist.gov/vuln/detail/CVE-2025-66568