CVE-2021-21684

描述

Jenkins Git Plugin 4.8.2 and earlier does not escape the Git SHA-1 checksum parameters provided to commit notifications when displaying them in a build cause. This results in a stored cross-site scripting (XSS) vulnerability exploitable by attackers able to submit crafted commit notifications to the `/git/notifyCommit` endpoint. Jenkins Git Plugin 4.8.3 rejects Git SHA-1 checksum parameters that do not match the expected format. Existing values are sanitized when displayed on the UI. This vulnerability is only exploitable in Jenkins 2.314 and earlier, LTS 2.303.1 and earlier. See the [LTS upgrade guide](https://www.jenkins.io/doc/upgrade-guide/2.303/#SECURITY-2452).

如何修補 CVE-2021-21684

要修補 CVE-2021-21684,請將受影響套件升級到下列已修補版本。

• —升級至 4.8.3 或更新版本

CVE-2021-21684 正在被利用嗎?

低 — EPSS 為 1.2%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• from 0, < 4.8.3

CVSS 分數

參考連結(5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-21684
• PATCHgithub.com/jenkinsci/git-plugin
• WEBwww.openwall.com/lists/oss-security/2021/10/06/1
• WEBgithub.com/jenkinsci/git-plugin/commit/5474cc942bfba60927be629ff47fb41c38c66741