Mitigation Strategies

To mitigate this vulnerability, you should restrict high privilege access such as realm administrator permissions to trusted users only, and avoid configuring untrusted or malicious LDAP servers.

Additionally, monitor and secure upstream LDAP servers to prevent compromise that could be exploited to send malformed LDAP password policy responses.

Applying any available patches or updates from Keycloak or your vendor addressing this CVE is also recommended to prevent the OutOfMemoryError and subsequent denial of service.

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Executive Summary

This vulnerability exists in Keycloak and can be exploited by a remote attacker who has high privileges, such as a realm administrator or someone who has compromised an upstream LDAP server.

The attacker sends a malformed LDAP password policy response during a password authentication request, which triggers an OutOfMemoryError in the Keycloak Java Virtual Machine (JVM).

This error causes the JVM to terminate, leading to a denial of service (DoS) for all realms on the affected node.

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Impact Analysis

The primary impact of this vulnerability is a denial of service (DoS) condition.

When exploited, the Keycloak JVM crashes due to an OutOfMemoryError, causing all realms on the affected node to become unavailable.

This can disrupt authentication services and potentially halt access to applications relying on Keycloak for identity and access management.

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Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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