CVE-2020-2309: 
Java vulnerability analysis and mitigation

A security vulnerability identified as CVE-2020-2309 was discovered in Jenkins Kubernetes Plugin versions 1.27.3 and earlier. The vulnerability was disclosed on November 4, 2020, and is related to a missing permission check in an HTTP endpoint. This security issue affects Jenkins installations using the Kubernetes Plugin (Jenkins Advisory).

The vulnerability stems from an incorrect implementation of permission checks in an HTTP endpoint within the Jenkins Kubernetes Plugin. The security issue has been assigned a Medium severity rating according to CVSS scoring system. The vulnerability specifically allows attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins (Jenkins Advisory).

When exploited, this vulnerability allows attackers with Overall/Read permission to enumerate credentials IDs stored in Jenkins. These enumerated credentials IDs could potentially be used as part of a broader attack to capture the actual credentials if combined with another vulnerability (Jenkins Advisory).

The vulnerability requires an attacker to have Overall/Read permission in the Jenkins installation. The exploitation path involves accessing specific HTTP endpoints in the Kubernetes Plugin that lack proper permission checks (Jenkins Advisory).

The vulnerability has been fixed in Jenkins Kubernetes Plugin version 1.27.4. The updated version implements appropriate permission checks for credentials ID enumeration. Organizations using affected versions should upgrade to version 1.27.4 or later to mitigate this security risk (Jenkins Advisory).