Arbitrary Code Injection Affecting puma package, versions <3.12.4-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.51% (66th percentile)

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  • Snyk IDSNYK-DEBIAN12-PUMA-1557379
  • published3 Mar 2020
  • disclosed2 Mar 2020

Introduced: 2 Mar 2020

CVE-2020-5249  (opens in a new tab)
CWE-74  (opens in a new tab)

How to fix?

Upgrade Debian:12 puma to version 3.12.4-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream puma package and not the puma package as distributed by Debian. See How to fix? for Debian:12 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1