MitreCVELIST:CVE-2019-16254CVE-2019-16254
Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 allows HTTP Response Splitting. If a program using WEBrick inserts untrusted input into the response header, an attacker can exploit it to insert a newline character to split a header, and inject malicious content to deceive clients. NOTE: this issue exists because of an incomplete fix for CVE-2017-17742, which addressed the CRLF vector, but did not address an isolated CR or an isolated LF.
References
lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html
hackerone.com/reports/331984
lists.debian.org/debian-lts-announce/2019/11/msg00025.html
lists.debian.org/debian-lts-announce/2019/12/msg00009.html
lists.debian.org/debian-lts-announce/2020/08/msg00027.html
lists.debian.org/debian-lts-announce/2023/04/msg00033.html
seclists.org/bugtraq/2019/Dec/31
seclists.org/bugtraq/2019/Dec/32
security.gentoo.org/glsa/202003-06
www.debian.org/security/2019/dsa-4586
www.debian.org/security/2019/dsa-4587
www.oracle.com/security-alerts/cpujan2020.html
www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/
www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/
www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/
www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/
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