The urllib3 library 1.26.x before 1.26.4 for Python 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 urllib3 SSLContext will be silently accepted.
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References
History
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MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2021-03-15T00:00:00
Updated: 2024-08-03T21:40:14.323Z
Reserved: 2021-03-13T00:00:00
Link: CVE-2021-28363
Vulnrichment
No data.
NVD
Status : Modified
Published: 2021-03-15T18:15:19.017
Modified: 2024-11-21T05:59:35.823
Link: CVE-2021-28363
Redhat