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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Omniauth
  • Omniauth Saml
Onelogin
  • Ruby-saml

Configuration 1 [-]

OR cpe:2.3:a:omniauth:omniauth_saml:*:*:*:*:*:ruby:*:*
cpe:2.3:a:omniauth:omniauth_saml:*:*:*:*:*:ruby:*:*
cpe:2.3:a:omniauth:omniauth_saml:*:*:*:*:*:ruby:*:*
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*

No data.

References
Link Providers
https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released cve-icon cve-icon
https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials cve-icon cve-icon
https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a cve-icon cve-icon
https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1 cve-icon cve-icon
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4 cve-icon cve-icon
https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0 cve-icon cve-icon
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq cve-icon cve-icon
https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20250314-0008/ cve-icon
History

Fri, 01 Aug 2025 15:00:00 +0000

Type Values Removed Values Added
First Time appeared Omniauth
Omniauth omniauth Saml
Onelogin
Onelogin ruby-saml
CPEs cpe:2.3:a:omniauth:omniauth_saml:*:*:*:*:*:ruby:*:*
cpe:2.3:a:onelogin:ruby-saml:*:*:*:*:*:*:*:*
Vendors & Products Omniauth
Omniauth omniauth Saml
Onelogin
Onelogin ruby-saml
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Sat, 12 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00179}

 epss

{'score': 0.00271}

Fri, 14 Mar 2025 10:45:00 +0000

Type Values Removed Values Added
References

Wed, 12 Mar 2025 21:45:00 +0000

Type Values Removed Values Added
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U'}

 cvssV4_0

{'score': 7.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P'}

Wed, 12 Mar 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Wed, 12 Mar 2025 21:00:00 +0000

Type Values Removed Values Added
References

Wed, 12 Mar 2025 20:30:00 +0000

Type Values Removed Values Added
Description 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.
Title ruby-saml vulnerable to Remote Denial of Service (DoS) with compressed SAML responses
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-03-12T20:11:08.860Z

Updated: 2025-03-14T10:03:12.372Z

Reserved: 2025-02-06T17:13:33.122Z

Link: CVE-2025-25293

cve-icon Vulnrichment

Updated: 2025-03-14T10:03:12.372Z

cve-icon NVD

Status : Analyzed

Published: 2025-03-12T21:15:42.363

Modified: 2025-08-01T14:45:47.293

Link: CVE-2025-25293

cve-icon Redhat

No data.