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CVE-2024-21647

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CVE-2024-21647

Published: Jan 8, 2024

Modified: Nov 3, 2025

PUBLISHED

CVSS v3.1

5.9

MEDIUM

Description

Puma is a web server for Ruby/Rack applications built for parallelism. Prior to version 6.4.2, puma exhibited incorrect behavior when parsing chunked transfer encoding bodies in a way that allowed HTTP request smuggling. Fixed versions limits the size of chunk extensions. Without this limit, an attacker could cause unbounded resource (CPU, network bandwidth) consumption. This vulnerability has been fixed in versions 6.4.2 and 5.6.8.

VendorProductVersions

puma

puma

affected
< 5.6.8
affected
>= 6.0.0, < 6.4.2

Weaknesses (CWE)

CWE-444

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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