Keycloak XMLSignatureUtil flaw: SAML sig validation bypass for privilege escalation
CVE-2024-8698 Published on September 19, 2024

Keycloak-saml-core: 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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Vulnerability Analysis

CVE-2024-8698 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
HIGH
Privileges Required:
LOW
User Interaction:
NONE
Scope:
CHANGED
Confidentiality Impact:
HIGH
Integrity Impact:
LOW
Availability Impact:
LOW

Timeline

Reported to Red Hat.

Made public. 9 days later.

Weakness Type

Improper Verification of Cryptographic Signature

The software does not verify, or incorrectly verifies, the cryptographic signature for data.


Products Associated with CVE-2024-8698

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2024-8698 are published in these products:

Red Hat Build Keycloak
 
Red Hat Jboss Enterprise Application Platform
 
Red Hat Single Sign On
 
Red Hat Rhosemc
 
Red Hat Keycloak
 

Exploit Probability

EPSS
80.68%
Percentile
99.11%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.