CVE-2021-20230
7.5
HIGH
CVSS 3.1
EPSS 1.2%
描述
A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.
如何修補 CVE-2021-20230
要修補 CVE-2021-20230,請將受影響套件升級到下列已修補版本。
- —升級至 3:5.56+dfsg-8 或更新版本
CVE-2021-20230 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, < 3:5.56+dfsg-8
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |