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osvGoogleOSV:GHSA-84J7-475P-HP8V
HistoryFeb 28, 2020 - 4:53 p.m.

HTTP Response Splitting in Puma

2020-02-2816:53:55
Google
osv.dev
33

0.011 Low

EPSS

Percentile

84.2%

JSON

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.

CPENameOperatorVersion
pumaeq3.11.1
pumaeq1.4.0
pumaeq2.13.2
pumaeq3.0.1
pumaeq3.6.1
pumaeq4.2.0
pumaeq4.3.1
pumaeq1.6.1
pumaeq1.2.2
pumaeq2.10.0
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0.011 Low

EPSS

Percentile

84.2%

JSON
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