{"id":"UBUNTU-CVE-2019-16201","details":"WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.","modified":"2026-02-04T04:13:33.604958Z","published":"2019-11-20T00:00:00Z","related":["USN-4201-1"],"upstream":["CVE-2019-16201"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-16201"},{"type":"REPORT","url":"https://www.ruby-lang.org/en/news/2019/10/01/webrick-regexp-digestauth-dos-cve-2019-16201/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4201-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-16201"}],"affected":[{"package":{"name":"jruby","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/jruby@1.5.6-9+deb8u2build0.14.04.1~esm2?arch=source&distro=trusty/esm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.5.6-9+deb8u2build0.14.04.1~esm2"}]}],"versions":["1.5.6-5ubuntu1","1.5.6-6","1.5.6-7"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): 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subscription 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