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GHSA-xgfv-xpx8-qhcr: Improper Verification of SAML Responses Leading to Privilege Escalation in Keycloak

A flaw exists in the SAML signature validation method within the Keycloak XMLSignatureUtil class. The method incorrectly determines whether a SAML signature is for the full document or only for specific assertions based on the position of the signature in the XML document, rather than the Reference element used to specify the signed element. This flaw allows attackers to create crafted responses that can bypass the validation, potentially leading to privilege escalation or impersonation attacks.

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  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. GHSA-xgfv-xpx8-qhcr

Improper Verification of SAML Responses Leading to Privilege Escalation in Keycloak

High severity GitHub Reviewed Published Oct 14, 2024 in keycloak/keycloak • Updated Oct 14, 2024

Package

maven org.keycloak:keycloak-saml-core (Maven)

Affected versions

<= 22.0.12

>= 23.0.0, <= 24.0.7

>= 25.0.0, <= 25.0.5

Patched versions

22.0.13

24.0.8

25.0.6

A flaw exists in the SAML signature validation method within the Keycloak XMLSignatureUtil class. The method incorrectly determines whether a SAML signature is for the full document or only for specific assertions based on the position of the signature in the XML document, rather than the Reference element used to specify the signed element. This flaw allows attackers to create crafted responses that can bypass the validation, potentially leading to privilege escalation or impersonation attacks.

References

  • GHSA-xgfv-xpx8-qhcr

Published to the GitHub Advisory Database

Oct 14, 2024

Last updated

Oct 14, 2024

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