CVE-2024-45409

The Ruby SAML library vulnerable to a SAML authentication bypass via Incorrect XPath selector

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.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 14.91% Top 10%
Vendor Advisory github.com Vendor Advisory github.com
Affected: SAML-Toolkits ruby-saml
Published at:
Updated at:

References

Link Tags
https://github.com/SAML-Toolkits/ruby-saml/security/advisories/GHSA-jw9c-mfg7-9rx2 vendor advisory
https://github.com/omniauth/omniauth-saml/security/advisories/GHSA-cvp8-5r8g-fhvq vendor advisory
https://github.com/SAML-Toolkits/ruby-saml/commit/1ec5392bc506fe43a02dbb66b68741051c5ffeae patch
https://github.com/SAML-Toolkits/ruby-saml/commit/4865d030cae9705ee5cdb12415c654c634093ae7 patch
https://lists.debian.org/debian-lts-announce/2024/11/msg00006.html
https://news.ycombinator.com/item?id=41586031
https://security.netapp.com/advisory/ntap-20240926-0008/
https://ssoready.com/blog/engineering/ruby-saml-pwned-by-xml-signature-wrapping-attacks/

Frequently Asked Questions

What is the severity of CVE-2024-45409?
CVE-2024-45409 has been scored as a critical severity vulnerability.
How to fix CVE-2024-45409?
To fix CVE-2024-45409, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-45409 being actively exploited in the wild?
It is possible that CVE-2024-45409 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~15% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-45409?
CVE-2024-45409 affects SAML-Toolkits ruby-saml.
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