CVE-2025-25293

HIGH EPSS 68.2%
Published Mar 12, 20251y ago · Modified Jun 17, 20261w ago
7.7 CVSS 4.0
High
Find Similar
Published Mar 12, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
7.7
Exploitability
—
Impact
—
Vector string
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
68.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-400 Uncontrolled Resource Consumption Resource Mgmt

Affected Products 5

VendorProductVersionRange
omniauthomniauth_saml* <1.10.6
omniauthomniauth_saml*≥2.0.0  –  <2.1.3
omniauthomniauth_saml*≥2.2.0  –  <2.2.3
oneloginruby-saml* <1.12.4
oneloginruby-saml*≥1.13.0  –  <1.18.0

References 11

  • about.gitlab.com https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released
    Patch
  • github.blog https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials
    ExploitThird Party Advisory
  • github.com https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a
    Patch
  • github.com https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1
    Patch
  • github.com https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.12.4
    Release Notes
  • github.com https://github.com/SAML-Toolkits/ruby-saml/releases/tag/v1.18.0
    Release Notes
  • github.com https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq
    Vendor Advisory
  • github.com https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv
    Vendor Advisory
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/04/msg00011.html
  • security.netapp.com https://security.netapp.com/advisory/ntap-20250314-0008/
    Third Party Advisory
  • securitylab.github.com https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml
    ExploitThird Party Advisory

Remediation

  • about.gitlab.com https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released
    Patch
  • github.com https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a
    Patch
  • github.com https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1
    Patch