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    Dashboard / CVE / CVE-2025-25293

    CVE-2025-25293

    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.

    Published:Mar 12, 2025
    Last Modified:Nov 3, 2025
    EPS:Mar 12, 2025
    EPSS Score:0.02712
    CVSS Score:7.5

    Affected Products

    Vendor
    Omniauth
    Product
    Omniauth Saml
    Vendor
    Onelogin
    Product
    Ruby-saml

    Exploits

    https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentialshttps://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml

    References

    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/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
    https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
    https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml
    https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html
    https://security.netapp.com/advisory/ntap-20250314-0008/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High