CVE-2020-25613

Name	CVE-2020-25613
Description	An issue was discovered in Ruby through 2.5.8, 2.6.x through 2.6.6, and 2.7.x through 2.7.1. WEBrick, a simple HTTP server bundled with Ruby, had not checked the transfer-encoding header value rigorously. An attacker may potentially exploit this issue to bypass a reverse proxy (which also has a poor header check), which may lead to an HTTP Request Smuggling attack.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2391-1, DLA-2392-1, DLA-3408-1
Debian Bugs	972230

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
jruby (PTS)	bookworm	9.3.9.0+ds-8	fixed
	forky, trixie	9.4.8.0+ds-3	fixed
	sid	9.4.14.0+ds-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
jruby	source	stretch	1.7.26-1+deb9u3	DLA-2392-1
jruby	source	buster	9.1.17.0-3+deb10u1	DLA-3408-1
jruby	source	(unstable)	9.3.9.0+ds-1		972230
ruby2.3	source	stretch	2.3.3-1+deb9u9	DLA-2391-1
ruby2.3	source	(unstable)	(unfixed)
ruby2.5	source	buster	2.5.5-3+deb10u3
ruby2.5	source	(unstable)	(unfixed)
ruby2.7	source	(unstable)	2.7.1-4

Notes

https://www.ruby-lang.org/en/news/2020/09/29/http-request-smuggling-cve-2020-25613/
Fix in webrick: https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7