CVE-2024-21647

MEDIUM

Puma < 5.6.8 and 6.0.0-6.4.2 - HTTP Request Smuggling via Chunked Transfer Encoding

Title source: llm
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 5.9
EPSS 0.0096
EPSS Percentile 56.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-444
Status published
Products (2)
puma/puma < 5.6.8
rubygems/puma 6.0.0 - 6.4.2RubyGems
Published Jan 08, 2024
Tracked Since Feb 18, 2026