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CVE-2024-1135

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CVE-2024-1135

Published: Apr 16, 2024

Modified: Feb 13, 2025

PUBLISHED

CVSS v3.0

7.5

HIGH

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.

VendorProductVersions

benoitc

benoitc/gunicorn

affected
unspecified - <= latest

Weaknesses (CWE)

CWE-444

CVSS v3.0 Details

CVSS v3.0 Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

References

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