View name validation bypass in Jenkins

中 4.3CVE-2021-21640 · BIT-jenkins-2021-21640 · GHSA-w2hv-rcqr-2h7r · 07/04/2021 公開 · 17/06/2026 更新

要点

CVE-2021-21640 は org.jenkins-ci.main:jenkins-core, jenkins (jenkins) に影響する深刻度「中」 (CVSS 4.3) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.9%（全脆弱性の 79.7% より高い）。
対処：2.287, 2.277.2 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
org.jenkins-ci.main:jenkins-core Maven	`≥ 2.278, < 2.287< 2.277.2`	`2.2872.277.2`
jenkins jenkins	`≤ 2.277.1≤ 2.286`	修正版なし

概要

Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name. When a form to create a view is submitted, the name is included twice in the submission. One instance is validated, but the other instance is used to create the value.

This allows attackers with View/Create permission to create views with invalid or already-used names.

Jenkins 2.287, LTS 2.277.2 uses the same submitted value for validation and view creation.

NVD の説明

Jenkins 2.286 and earlier, LTS 2.277.1 and earlier does not properly check that a newly created view has an allowed name, allowing attackers with View/Create permission to create views with invalid or already-used names.