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AlienVault OTX Vulnerabilities

AlienVault OTX Malware

keycloak

A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.

CVE-2023-6544 is a vulnerability identified in Keycloak versions 22.0.0 and 23.0.0, stemming from a permissive regular expression hardcoded within the software's filtering mechanism for host validation during Dynamic Client Registration. Keycloak is an open-source identity and access management solution widely used for securing applications and services. The flaw allows malicious actors who have some level of authenticated access and knowledge about the environment to bypass intended restrictions on which hosts can register dynamic clients. This is possible because the regular expression used to filter allowed hosts is overly permissive, enabling unauthorized hosts to be accepted. Dynamic Client Registration is a feature that allows clients (applications) to register themselves dynamically with the authorization server, which is critical for flexible and scalable identity management. If an attacker successfully registers a rogue client, they could potentially gain unauthorized access to sensitive resources or manipulate identity tokens, thereby compromising confidentiality and integrity of the system. The vulnerability does not impact availability and does not require user interaction, but it does require some level of privilege (authenticated user). Currently, there are no known exploits in the wild, but the medium CVSS score of 5.4 reflects the moderate risk posed by this issue. The vulnerability was published on April 25, 2024, and assigned by Red Hat. Since no official patches are linked yet, organizations must rely on configuration hardening and monitoring until updates are released.

Detailed information about CVE-2023-6544: Permissive Regular Expression. Get real-time updates, technical details, and mitigation strategies.

CVE-2023-6544: Permissive Regular Expression - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-6544: Permissive Regular Expression

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