CVE-2021-21291
Subdomain checking of whitelisted domains could allow unintended redirects
描述
OAuth2 Proxy is an open-source reverse proxy and static file server that provides authentication using Providers (Google, GitHub, and others) to validate accounts by email, domain or group. In OAuth2 Proxy before version 7.0.0, for users that use the whitelist domain feature, a domain that ended in a similar way to the intended domain could have been allowed as a redirect. For example, if a whitelist domain was configured for ".example.com", the intention is that subdomains of example.com are allowed. Instead, "example.com" and "badexample.com" could also match. This is fixed in version 7.0.0 onwards. As a workaround, one can disable the whitelist domain feature and run separate OAuth2 Proxy instances for each subdomain.
如何修補 CVE-2021-21291
要修補 CVE-2021-21291,請將受影響套件升級到下列已修補版本。
- —升級至 7.0.0 或更新版本
- —未列出修補版本
- —未列出修補版本
- —升級至 7.0.0 或更新版本
- —升級至 7.0.0 或更新版本
CVE-2021-21291 正在被利用嗎?
低 — EPSS 為 1.4%,目前沒有觀察到大規模利用活動。
受影響套件(5)
- from 0, < 7.0.0
- from 0, <= 3.2.0
- from 0
- from 0, < 7.0.0
- from 0, < 7.0.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.4 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |