CVE-2024-1135

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.

How to fix CVE-2024-1135

To remediate CVE-2024-1135, upgrade the affected package to a fixed version below.

• —upgrade to 22.0.0 or later
• —upgrade to 22.0.0 or later

Is CVE-2024-1135 being exploited?

Low — EPSS is 3.0%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 22.0.0
• from 0, < 22.0.0

CVSS scores

References (11)

• ADVISORYgithub.com/advisories/GHSA-w3h3-4rj7-4ph4
• ADVISORYnvd.nist.gov/vuln/detail/CVE-2024-1135
• PATCHgithub.com/benoitc/gunicorn
• PATCHpypi.org/project/gunicorn
• WEB