PT-2025-11128 · Ruby-Saml+3 · Ruby-Saml+3

Pitbulk · Published 2025-03-12 · Updated 2025-09-26 · CVE-2025-25293

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions: ruby-saml versions prior to 1.12.4 and 1.18.0

Description: The issue is related to the ruby-saml library, which provides security assertion markup language (SAML) single sign-on (SSO) for Ruby. The library is susceptible to remote Denial of Service (DoS) with compressed SAML responses. This is because ruby-saml uses zlib to decompress SAML responses, and 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 may lead to remote Denial of Service (DoS).

Recommendations: To resolve the issue, update to version 1.12.4 or 1.18.0, or later, of the ruby-saml library. As a temporary workaround, consider disabling the use of compressed SAML responses until a patch is available. Restrict access to the vulnerable ruby-saml library to minimize the risk of exploitation.

Exploit

Fix

DoS

Resource Exhaustion

Improper Verification of Cryptographic Signature

Allocation of Resources Without Limits

Weakness Enumeration

CWE-400

CWE-347

CWE-770

Related Identifiers

BDU:2025-03642

BIT-GITLAB-2025-25293

CVE-2025-25293

DLA-4115-1

GHSA-92RQ-C8CF-PRRQ

GHSA-HW46-3HMR-X9XV

USN-7409-1

Affected Products

Debian

Linuxmint

Ubuntu

Ruby-Saml

References · 54

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/25xxx/CVE-2025-25293.json · Exploit
• 🔥 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/ruby-saml/CVE-2025-25293.yml · Exploit
• 🔥 https://securitylab.github.com/advisories/GHSL-2024-355_ruby-saml · Exploit
• 🔥 https://github.blog/security/sign-in-as-anyone-bypassing-saml-sso-authentication-with-parser-differentials · Exploit
• https://github.com/SAML-Toolkits/ruby-saml/commit/acac9e9cc0b9a507882c614f25d41f8b47be349a · Patch
• https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-92rq-c8cf-prrq · Vendor Advisory
• https://github.com/SAML-Toolkits/ruby-saml/commit/e2da4c6dae7dc01a4d9cd221395140a67e2b3eb1 · Patch
• https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-hw46-3hmr-x9xv · Vendor Advisory
• https://about.gitlab.com/releases/2025/03/12/patch-release-gitlab-17-9-2-released · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-25293 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-4115-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-25293 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-25293 · Security Note
• https://osv.dev/vulnerability/USN-7409-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-25291 · Vendor Advisory