CVE-2021-23393

描述

This affects the package Flask-Unchained before 0.9.0. When using the the _validate_redirect_url function, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\\evil.com/path. This vulnerability is only exploitable if an alternative WSGI server other than Werkzeug is used, or the default behaviour of Werkzeug is modified using 'autocorrect_location_header=False.

如何修補 CVE-2021-23393

要修補 CVE-2021-23393,請將受影響套件升級到下列已修補版本。

• —升級至 0.9.0 或更新版本
• —升級至 71e36b28166f9ffbe0a991f51127f0984f7e6a40 或更新版本

CVE-2021-23393 正在被利用嗎?

低 — EPSS 為 0.2%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 0.9.0
• from 0, < 71e36b28166f9ffbe0a991f51127f0984f7e6a40 | from 0, < 0.9.0

CVSS 分數

參考連結(6)

• ADVISORYgithub.com/advisories/GHSA-pjc4-3w99-j7v4
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2021-23393
• WEBgithub.com/briancappello/flask-unchained/commit/2bfeedf1bc31df851cab8c66df0c432b10406aad
• WEBgithub.com/briancappello/flask-unchained/commit/71e36b28166f9ffbe0a991f51127f0984f7e6a40