Regular Expression Denial of Service in WEBrick::HTTPAuth::DigestAuth

Regular Expression Denial of Service in WEBrick::HTTPAuth::DigestAuth

CVE-2019-16201 · HIGH Severity

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Learn more about our Cis Benchmark Audit For Server Software.