Improper Certificate Validation Affecting urllib3 package, versions [1.26.0,1.26.4)
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Test your applications- Snyk ID SNYK-PYTHON-URLLIB3-1085966
- published 16 Mar 2021
- disclosed 16 Mar 2021
- credit Jorge, Quentin Pradet
Introduced: 16 Mar 2021
CVE-2021-28363 Open this link in a new tabHow to fix?
Upgrade urllib3 to version 1.26.4 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 Certificate Validation. It omits SSL certificate validation in some cases involving HTTPS to HTTPS proxies. The initial connection to the HTTPS proxy (if an SSLContext isn't given via proxy_config) doesn't verify the hostname of the certificate. This means certificates for different servers that still validate properly with the default SSLContext will be silently accepted.