CVE-2021-21391
Regular expression Denial of Service in multiple packages
描述
### Impact A regular expression denial of service (ReDoS) vulnerability has been discovered in multiple CKEditor 5 packages. The vulnerability allowed to abuse particular regular expressions, which could cause a significant performance drop resulting in a browser tab freeze. It affects all users using the CKEditor 5 packages listed above at version <= 26.0.0. ### Patches The problem has been recognized and patched. The fix will be available in version 27.0.0. ### For more information Email us at security@cksource.com if you have any questions or comments about this advisory. ### Acknowledgements The CKEditor 5 team would like to thank Yeting Li for recognizing and reporting these vulnerabilities.
如何修補 CVE-2021-21391
要修補 CVE-2021-21391,請將受影響套件升級到下列已修補版本。
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
- —升級至 27.0.0 或更新版本
CVE-2021-21391 正在被利用嗎?
低 — EPSS 為 1.7%,目前沒有觀察到大規模利用活動。
受影響套件(8)
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
- from 0, < 27.0.0
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:N/UI:R/S:U/C:N/I:N/A:H |