CVE-2020-25613

HIGH LAB

Ruby < 2.5.8 - HTTP Request Smuggling

Title source: rule

Description

An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.

Exploits (1)

nomisec WORKING POC

by metapox · poc

https://github.com/metapox/CVE-2020-25613

View Code ZIP pw:eip

References (8)

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20210115-0008/

[Patch, Third Party Advisory] https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7

[Permissions Required, Third Party Advisory] https://hackerone.com/reports/965267

[Mailing List] https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html

[Vendor Advisory] https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/

[Mailing List, Third Party Advisory] https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/

[Third Party Advisory] https://security.gentoo.org/glsa/202401-27

Scores

CVSS v3 7.5

EPSS 0.0027

EPSS Percentile 50.6%

Attack Vector NETWORK

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

Lab Environment

COMMUNITY

Community Lab

docker pull haproxy:1.9.10

https://github.com/metapox/CVE-2020-25613

View in Library

Details

CWE

CWE-444

Status published

Products (5)

fedoraproject/fedora 32

fedoraproject/fedora 33

rubygems/webrick 1.6.0 - 1.6.1RubyGems

ruby-lang/ruby < 2.5.8

ruby-lang/webrick < 1.6.0

Published Oct 06, 2020

Tracked Since Feb 18, 2026