Improper Removal of Sensitive Information Before Storage or Transfer Affecting urllib3 package, versions [,1.26.19)[2.0.0a1, 2.2.2)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-URLLIB3-7267250
- published18 Jun 2024
- disclosed17 Jun 2024
- creditUnknown
Introduced: 17 Jun 2024
CVE-2024-37891 (opens in a new tab)How to fix?
Upgrade urllib3 to version 1.26.19, 2.2.2 or higher.
Overview
urllib3 is a HTTP library with thread-safe connection pooling, file post, and more.
Affected versions of this package are vulnerable to Improper Removal of Sensitive Information Before Storage or Transfer due to the improper handling of the Proxy-Authorization header during cross-origin redirects when ProxyManager is not in use. When the conditions below are met, including non-recommended configurations, the contents of this header can be sent in an automatic HTTP redirect.
Notes:
To be vulnerable, the application must be doing all of the following:
Setting the
Proxy-Authorizationheader without using urllib3's built-in proxy support.Not disabling HTTP redirects (e.g. with
redirects=False)Either not using an HTTPS origin server, or having a proxy or target origin that redirects to a malicious origin.
Workarounds
Using the
Proxy-Authorizationheader with urllib3'sProxyManager.Disabling HTTP redirects using
redirects=Falsewhen sending requests.Not using the
Proxy-Authorizationheader.