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CVE-2024-1135

Disclosure Date: April 16, 2024
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Description

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.

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CVSS V3 Severity and Metrics
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Exploitability Score:
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Privileges Required (PR):
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User Interaction (UI):
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General Information

Vendors

  • benoitc

Products

  • benoitc/gunicorn

Additional Info

Technical Analysis