Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS14Z2Z2LXhweDgtcWhjcs4ABAQR

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.

Permalink: https://github.com/advisories/GHSA-xgfv-xpx8-qhcr
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS14Z2Z2LXhweDgtcWhjcs4ABAQR
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 1 day ago
Updated: 1 day ago

CVSS Score: 7.7
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L

Identifiers: GHSA-xgfv-xpx8-qhcr
References:

• https://github.com/keycloak/keycloak/security/advisories/GHSA-xgfv-xpx8-qhcr
• https://github.com/advisories/GHSA-xgfv-xpx8-qhcr

Repository: https://github.com/keycloak/keycloak
Blast Radius: 18.1

Affected Packages