It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2652 advisory.

    urllib3 is a user-friendly HTTP client library for Python. When using urllib3's proxy support with     `ProxyManager`, the `Proxy-Authorization` header is only sent to the configured proxy, as expected.
    However, when sending HTTP requests *without* using urllib3's proxy support, it's possible to accidentally     configure the `Proxy-Authorization` header even though it won't have any effect as the request is not     using a forwarding proxy or a tunneling proxy. In those cases, urllib3 doesn't treat the `Proxy-     Authorization` HTTP header as one carrying authentication material and thus doesn't strip the header on     cross-origin redirects. Because this is a highly unlikely scenario, we believe the severity of this     vulnerability is low for almost all users. Out of an abundance of caution urllib3 will automatically strip     the `Proxy-Authorization` header during cross-origin redirects to avoid the small chance that users are     doing this on accident. Users should use urllib3's proxy support or disable automatic redirects to achieve     safe processing of the `Proxy-Authorization` header, but we still decided to strip the header by default     in order to further protect users who aren't using the correct approach. We believe the number of usages     affected by this advisory is low. It requires all of the following to be true to be exploited: 1. Setting     the `Proxy-Authorization` header without using urllib3's built-in proxy support. 2. Not disabling HTTP     redirects. 3. Either not using an HTTPS origin server or for the proxy or target origin to redirect to a     malicious origin. Users are advised to update to either version 1.26.19 or version 2.2.2. Users unable to     upgrade may use the `Proxy-Authorization` header with urllib3's `ProxyManager`, disable HTTP redirects     using `redirects=False` when sending requests, or not user the `Proxy-Authorization` header as     mitigations. (CVE-2024-37891)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Detections

Analytics

Amazon Linux 2 : python-pip (ALAS-2024-2652)

medium Nessus Plugin ID 209142

Version 1.1