CVE-2020-5247 – puma

Package

Manager: gem
Name: puma
Vulnerable Version: >=0 <3.12.4 || >=4.0.0 <4.3.3

Severity

Level: Medium

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

EPSS: 0.00774 pctl0.72712

Details

HTTP Response Splitting in Puma In Puma (RubyGem) before 4.3.2 and 3.12.3, if an application using Puma allows untrusted input in a response header, an attacker can use newline characters (i.e. `CR`, `LF` or`/r`, `/n`) to end the header and inject malicious content, such as additional headers or an entirely new response body. This vulnerability is known as HTTP Response Splitting. While not an attack in itself, response splitting is a vector for several other attacks, such as cross-site scripting (XSS). This is related to CVE-2019-16254, which fixed this vulnerability for the WEBrick Ruby web server. This has been fixed in versions 4.3.2 and 3.12.3 by checking all headers for line endings and rejecting headers with those characters.

Metadata

Created: 2020-02-28T16:53:55Z
Modified: 2023-05-16T16:16:12Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/02/GHSA-84j7-475p-hp8v/GHSA-84j7-475p-hp8v.json
CWE IDs: ["CWE-113"]
Alternative ID: GHSA-84j7-475p-hp8v
Finding: F184
Auto approve: 1