Gunicorn fails to properly validate Transfer-Encoding headers, leading to HTTP Request Smuggling (HRS) vulnerabilities. By crafting requests with conflicting Transfer-Encoding headers, attackers can bypass security restrictions and access restricted endpoints. This issue is due to Gunicorn's handling of Transfer-Encoding headers, where it incorrectly processes requests with multiple, conflicting Transfer-Encoding headers, treating them as chunked regardless of the final encoding specified. This vulnerability allows for a range of attacks including cache poisoning, session manipulation, and data exposure.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: @huntr_ai

Published: 2024-04-16T00:00:14.938Z

Updated: 2024-08-01T18:26:30.502Z

Reserved: 2024-01-31T18:15:14.296Z

Link: CVE-2024-1135

cve-icon Vulnrichment

Updated: 2024-08-01T18:26:30.502Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-16T00:15:07.797

Modified: 2024-06-30T23:15:02.563

Link: CVE-2024-1135

cve-icon Redhat

Severity : Important

Publid Date: 2024-04-15T00:00:00Z

Links: CVE-2024-1135 - Bugzilla