HTTP Response Splitting vulnerability in puma
If an application using Puma allows untrusted input in a response header,
an attacker can use newline characters (i.e. CR, LF) 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).
Moderate severity vulnerability that affects puma
In Puma (RubyGem) before 4.3.2 and 3.12.2, 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.
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Bumps puma from 3.12.2 to 3.12.4. This update includes security fixes.
Vulnerabilities fixed
Sourced from The Ruby Advisory Database.
Sourced from The GitHub Security Advisory Database.
Changelog
Sourced from puma's changelog.
Commits
f809e6bAdd missing server_run87fc7d73.12.4e79a5b2HTTP Injection - fix bug + 1 more vector (#2136)2ff978f3.12.33a2b918Test backport37928cb4.3.2 and 3.12.3 release notes1b17e85Merge pull request from GHSA-84j7-475p-hp8vDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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