National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2020-5249 Detail

Current Description

In Puma (RubyGem) before 4.3.3 and 3.12.4, 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. 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, which fixed this vulnerability but only for regular responses. This has been fixed in 4.3.3 and 3.12.4.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 6.5 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
Base Score: 6.5 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/puma/puma/commit/c22712fc93284a45a93f9ad7023888f3a65524f3 Patch Third Party Advisory
https://github.com/puma/puma/security/advisories/GHSA-33vf-4xgg-9r58 Third Party Advisory
https://github.com/puma/puma/security/advisories/GHSA-84j7-475p-hp8v Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BMJ3CGZ3DLBJ5WUUKMI5ZFXFJQMXJZIK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DIHVO3CQMU7BZC7FCTSRJ33YDNS3GFPK/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NJ3LL5F5QADB6LM46GXZETREAKZMQNRD/
https://owasp.org/www-community/attacks/HTTP_Response_Splitting Third Party Advisory

Weakness Enumeration

CWE-ID CWE Name Source
CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') NIST  
CWE-113 Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Response Splitting') GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*
     Show Matching CPE(s)
Up to (including)
3.12.3
 cpe:2.3:a:puma:puma:*:*:*:*:*:ruby:*:*
     Show Matching CPE(s)
From (including)
4.0.0
Up to (including)
4.3.2


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-5249
NVD Published Date:
03/02/2020
NVD Last Modified:
04/09/2020