CVE-2023-30861

描述

Flask is a lightweight WSGI web application framework. When all of the following conditions are met, a response containing data intended for one client may be cached and subsequently sent by the proxy to other clients. If the proxy also caches `Set-Cookie` headers, it may send one client's `session` cookie to other clients. The severity depends on the application's use of the session and the proxy's behavior regarding cookies. The risk depends on all these conditions being met. 1. The application must be hosted behind a caching proxy that does not strip cookies or ignore responses with cookies. 2. The application sets `session.permanent = True` 3. The application does not access or modify the session at any point during a request. 4. `SESSION_REFRESH_EACH_REQUEST` enabled (the default). 5. The application does not set a `Cache-Control` header to indicate that a page is private or should not be cached. This happens because vulnerable versions of Flask only set the `Vary: Cookie` header when the session is accessed or modified, not when it is refreshed (re-sent to update the expiration) without being accessed or modified. This issue has been fixed in versions 2.3.2 and 2.2.5.

如何修補 CVE-2023-30861

要修補 CVE-2023-30861,請將受影響套件升級到下列已修補版本。

• —升級至 1.1.2-2+deb11u1 或更新版本
• —升級至 1.0.2-3+deb10u1 或更新版本
• —升級至 1.1.2-2+deb11u1 或更新版本
• —升級至 2.3.2 或更新版本
• —升級至 70f906c51ce49c485f1d355703e9cc3386b1cc2b 或更新版本

CVE-2023-30861 正在被利用嗎?

低 — EPSS 為 1.3%,目前沒有觀察到大規模利用活動。

受影響套件(5)

• from 0, < 1.1.2-2+deb11u1
• from 0, < 1.0.2-3+deb10u1
• from 0, < 1.1.2-2+deb11u1
• >= 2.3.0, < 2.3.2
• from 0, < 70f906c51ce49c485f1d355703e9cc3386b1cc2b, < afd63b16170b7c047f5758eb910c416511e9c965 | from 0, < 2.2.5, >= 2.3.0, < 2.3.2

CVSS 分數

參考連結(12)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-30861
• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2023-30861
• PATCHgithub.com/pallets/flask
• WEBgithub.com/pallets/flask/commit/70f906c51ce49c485f1d355703e9cc3386b1cc2b