{"id":"CVE-2019-16254","details":"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.","modified":"2026-05-15T12:03:51.241917024Z","published":"2019-11-26T18:15:15.210Z","related":["ALSA-2021:2587","ALSA-2021:2588","SUSE-SU-2020:0737-1","SUSE-SU-2020:1570-1","openSUSE-SU-2020:0395-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","cpes":["cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"],"extracted_events":[{"last_affected":"8.0"}],"vendor_product":"debian:debian_linux"}]},"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2019/12/msg00009.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2020/08/msg00027.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html"},{"type":"WEB","url":"https://seclists.org/bugtraq/2019/Dec/31"},{"type":"WEB","url":"https://seclists.org/bugtraq/2019/Dec/32"},{"type":"WEB","url":"https://www.oracle.com/security-alerts/cpujan2020.html"},{"type":"ADVISORY","url":"https://hackerone.com/reports/331984"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/11/msg00025.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202003-06"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4586"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4587"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/ja/news/2019/10/01/http-response-splitting-in-webrick-cve-2019-16254/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-4-8-released/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-5-7-released/"},{"type":"ADVISORY","url":"https://www.ruby-lang.org/ja/news/2019/10/01/ruby-2-6-5-released/"}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}