A critical vulnerability has been discovered in Argo CD, a popular Kubernetes application management tool, potentially exposing sensitive repository credentials. This flaw resides within the API endpoint `/api/v1/projects/{project}/detailed`, allowing API tokens with basic 'get' permissions on projects to access and reveal usernames and passwords for associated repositories in plain text. This exposure impacts any user or service with standard permissions, going beyond the intended security model.
The vulnerability stems from an authorisation failure in the Project API. An attacker exploiting this flaw could gain access to source code, manipulate CI/CD pipelines, and escalate privileges within the development infrastructure. Furthermore, malicious actors could exfiltrate confidential data or inject malicious code into critical stages of the software development lifecycle, posing a significant risk to project confidentiality and CI/CD integrity.
Immediate action is required to mitigate this risk. Users are urged to upgrade Argo CD to a patched version (v3.1.2, v3.0.14, v2.14.16, or v2.13.9). Additionally, it is recommended to audit existing API tokens, revoke unnecessary ones, and carefully review logs for suspicious access to the vulnerable endpoint. Strengthening role segmentation and implementing the principle of least privilege are crucial in CI/CD infrastructures to prevent such vulnerabilities in the future.
The rapid spread of this vulnerability highlights the importance of continuous monitoring and timely updates of critical platforms. Argo CD users should act urgently to patch their systems, revoke non-essential access, and verify the historical exposure of credentials to contain any potential damage.
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