CVE-2020-5249 – 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:L/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

EPSS: 0.00498 pctl0.64862

Details

HTTP Response Splitting (Early Hints) in Puma ### Impact If an application using Puma allows untrusted input in an early-hints header, an attacker can use a carriage return character 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](https://owasp.org/www-community/attacks/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-2020-5247](https://github.com/puma/puma/security/advisories/GHSA-84j7-475p-hp8v), which fixed this vulnerability but only for regular responses. ### Patches This has been fixed in 4.3.3 and 3.12.4. ### Workarounds Users can not allow untrusted/user input in the Early Hints response header. ### For more information If you have any questions or comments about this advisory: * Open an issue in [puma](https://github.com/puma/puma) * Email us a project maintainer. [Email addresses are listed in our Code of Conduct](https://github.com/puma/puma/blob/master/CODE_OF_CONDUCT.md#enforcement).

Metadata

Created: 2020-03-03T23:33:16Z
Modified: 2023-05-16T16:16:20Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/03/GHSA-33vf-4xgg-9r58/GHSA-33vf-4xgg-9r58.json
CWE IDs: ["CWE-113", "CWE-74"]
Alternative ID: GHSA-33vf-4xgg-9r58
Finding: F184
Auto approve: 1