HTTP Request Smuggling Affecting puma package, versions <4.3.9 >=5.0.0, <5.5.1
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Test your applications- Snyk ID SNYK-RUBY-PUMA-1730572
- published 13 Oct 2021
- disclosed 12 Oct 2021
- credit asta12, mattiasgrenfeldt
Introduced: 12 Oct 2021
CVE-2021-41136 Open this link in a new tabHow to fix?
Upgrade puma to version 4.3.9, 5.5.1 or higher.
Overview
puma is a simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly concurrent Ruby implementations such as Rubinius and JRuby as well as as providing process worker support to support CRuby well.
Affected versions of this package are vulnerable to HTTP Request Smuggling when using a proxy which forwards LF characters as line endings. A client could smuggle a request through a proxy, causing the proxy to send a response back to another unknown client.