CVE-2021-21623
Incorrect permission checks in Jenkins Matrix Authorization Strategy Plugin may allow accessing some items
描述
Items (like jobs) can be organized hierarchically in Jenkins, using the Folders Plugin or something similar. An item is expected to be accessible only if all its ancestors are accessible as well. Matrix Authorization Strategy Plugin 2.6.5 and earlier does not correctly perform permission checks to determine whether an item should be accessible. This allows attackers with Item/Read permission on nested items to access them, even if they lack Item/Read permission for parent folders.\n\nMatrix Authorization Strategy Plugin 2.6.6 requires Item/Read permission on parent items to grant Item/Read permission on an individual item. As a workaround in older releases, do not grant permissions on individual items to users who do not have access to parent items. In case of problems, the [Java system property](https://www.jenkins.io/doc/book/managing/system-properties/) `hudson.security.AuthorizationMatrixProperty.checkParentPermissions` can be set to false, completely disabling this fix.
如何修補 CVE-2021-21623
要修補 CVE-2021-21623,請將受影響套件升級到下列已修補版本。
- —升級至 2.6.6 或更新版本
CVE-2021-21623 正在被利用嗎?
低 — EPSS 為 0.1%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- from 0, < 2.6.6
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |