Requests is a HTTP library. Since Requests 2.3.0, Requests has been leaking Proxy-Authorization headers to destination servers when redirected to an HTTPS endpoint. This is a product of how we use `rebuild_proxies` to reattach the `Proxy-Authorization` header to requests. For HTTP connections sent through the tunnel, the proxy will identify the header in the request itself and remove it prior to forwarding to the destination server. However when sent over HTTPS, the `Proxy-Authorization` header must be sent in the CONNECT request as the proxy has no visibility into the tunneled request. This results in Requests forwarding proxy credentials to the destination server unintentionally, allowing a malicious actor to potentially exfiltrate sensitive information. This issue has been patched in version 2.31.0.
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History
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MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2023-05-26T17:02:52.899Z
Updated: 2024-08-02T15:25:36.610Z
Reserved: 2023-05-11T16:33:45.731Z
Link: CVE-2023-32681
Vulnrichment
No data.
NVD
Status : Modified
Published: 2023-05-26T18:15:14.147
Modified: 2024-11-21T08:03:50.377
Link: CVE-2023-32681
Redhat