CVE-2020-27838 Scanner

KeyCloak is an open-source identity and access management solution for modern applications and services. It is widely used by developers and organizations for secure user authentication and authorization. KeyCloak streamlines the process of implementing single sign-on (SSO) capabilities across applications. Its client registration feature supports easy account management, making it an attractive option for IT personnel handling user credentials and permissions. Companies use KeyCloak to integrate identity management into their applications seamlessly, ensuring a smooth and secure user login experience. KeyCloak's modular approach assists in expanding its functionalities through various plugins.

The vulnerability detected in KeyCloak involves an information disclosure issue. It occurs when the client registration endpoint allows unauthorized fetching of information about PUBLIC clients. Such clients do include sensitive data like client secrets, which should remain confidential. The issue exacerbates if a previously PUBLIC client transitions to a CONFIDENTIAL status. This flaw can lead to severe data confidentiality threats. Attackers aware of this vulnerability could exploit it maliciously. Potential exposure of valuable data could undermine system security.

Technical details of this vulnerability indicate that the flaw resides in the client registration endpoint. This endpoint, when accessed in its vulnerable state, provides sensitive information without requiring proper authentication. The vulnerable endpoint allows fetching of PUBLIC clients' details, including client secrets, thus posing a security risk. The vulnerability is only concerning if a PUBLIC client transitions to a CONFIDENTIAL client without resetting details. Such transitions, without attention, leave sensitive information accessible to unauthorized users. Mitigating this risk involves securing client transitions and monitoring endpoint access closely.

Exploitation of this vulnerability by malicious entities could lead to unauthorized access to sensitive client data. It poses a significant risk to data confidentiality as attackers may gather client secrets. This exposure could further enable attackers to impersonate legitimate users, leading to unauthorized actions. It might also result in data breaches, with potential financial and reputational damages for affected organizations. Careful monitoring and patching of such vulnerabilities are crucial for maintaining data integrity and security.

REFERENCES

• https://bugzilla.redhat.com/show_bug.cgi?id=1906797
• https://nvd.nist.gov/vuln/detail/CVE-2020-27838
• https://github.com/muneebaashiq/MBProjects
• https://github.com/j4k0m/godkiller