CVE-2021-21636
Java vulnerability analysis and mitigation

Overview

A missing permission check vulnerability (CVE-2021-21636) was discovered in Jenkins Team Foundation Server Plugin versions 5.157.1 and earlier. The vulnerability was disclosed on March 30, 2021, affecting the plugin's HTTP endpoint security implementation (Jenkins Advisory, OSS Security).

Technical details

The vulnerability stems from a missing permission check in an HTTP endpoint of the Team Foundation Server Plugin. The CVSS v3.1 base score is 4.3 (Medium) with a vector string of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N. The vulnerability is classified as CWE-862 (Missing Authorization) (NVD).

Impact

The vulnerability allows attackers with Overall/Read permission to enumerate credentials IDs of credentials stored in Jenkins. These enumerated credentials IDs could potentially be used as part of a broader attack to capture the credentials using another vulnerability (Jenkins Advisory).

Mitigation and workarounds

As of the publication of the advisory on March 30, 2021, no fix was available for this vulnerability in the Team Foundation Server Plugin (Jenkins Advisory).

Additional resources


SourceThis report was generated using AI

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