CVE-2020-25613

high

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.

References

https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7

https://hackerone.com/reports/965267

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

https://lists.fedoraproject.org/archives/list/[email protected]/message/PFP3E7KXXT3H3KA6CBZPUOGA5VPFARRJ/

https://lists.fedoraproject.org/archives/list/[email protected]/message/YTZURYROG3FFED3TYCQOBV66BS4K6WOV/

https://security.netapp.com/advisory/ntap-20210115-0008/

Details

Source: MITRE

Published: 2020-10-06

Updated: 2022-01-01

Type: CWE-444

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

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

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH