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keycloak

A flaw was found in Keycloak, where it does not correctly validate its client step-up authentication in org.keycloak.authentication. This flaw allows a remote user authenticated with a password to register a false second authentication factor along with an existing one and bypass authentication.

CVE-2023-3597 is a vulnerability identified in Keycloak, an open-source identity and access management solution widely used for securing applications and services. The flaw lies in the improper validation of client step-up authentication within the org.keycloak.authentication module. Step-up authentication is a security mechanism that requires users to provide additional authentication factors under certain conditions. In this case, the vulnerability allows a remote attacker who is already authenticated with a password (low privilege) to register a fraudulent second-factor authentication method alongside an existing legitimate one. This bypasses the intended multi-factor authentication (MFA) protections, potentially allowing the attacker to circumvent enhanced authentication requirements. The vulnerability affects Keycloak versions from initial releases up to 23.0.0. The CVSS 3.1 score of 5.0 (medium severity) reflects that the attack vector is network-based (AV:N), requires low privileges (PR:L), no user interaction (UI:N), and impacts confidentiality, integrity, and availability to a limited degree (C:L/I:L/A:L). Although no known exploits are currently reported in the wild, the flaw represents a significant risk to environments relying on Keycloak for MFA enforcement. The improper validation could lead to unauthorized access escalation, undermining the security posture of protected applications and services. The vulnerability was reserved in July 2023 and published in April 2024, with no official patches linked yet, indicating the need for vigilance and proactive mitigation by administrators.

Detailed information about CVE-2023-3597: Improper Authentication. Get real-time updates, technical details, and mitigation strategies.

CVE-2023-3597: Improper Authentication - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-3597: Improper Authentication

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