Detections
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CVE-2024-45409

critical

Description

The Ruby SAML library is for implementing the client side of a SAML authorization. Ruby-SAML in <= 12.2 and 1.13.0 <= 1.16.0 does not properly verify the signature of the SAML Response. An unauthenticated attacker with access to any signed saml document (by the IdP) can thus forge a SAML Response/Assertion with arbitrary contents. This would allow the attacker to log in as arbitrary user within the vulnerable system. This vulnerability is fixed in 1.17.0 and 1.12.3.

References

https://thehackernews.com/2025/03/github-uncovers-new-ruby-saml.html

https://securityonline.info/gitlab-backports-fix-for-cve-2024-45409-to-older-versions/?&web_view=true

https://www.darkreading.com/application-security/gitlab-warns-max-severity-authentication-bypass-bug

https://www.bleepingcomputer.com/news/security/gitlab-releases-fix-for-critical-saml-authentication-bypass-flaw/

https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-cvp8-5r8g-fhvq

https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2

https://github.com/SAML-Toolkits/ruby-saml/commit/4865d030cae9705ee5cdb12415c654c634093ae7

https://github.com/SAML-Toolkits/ruby-saml/commit/1ec5392bc506fe43a02dbb66b68741051c5ffeae

Details

Source: Mitre, NVD

Published: 2024-09-10

Updated: 2024-09-20

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

CVSS v4

Base Score: 9.9

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

Severity: Critical

EPSS

EPSS: 0.158