Provide references for CVE-2019-17421.
Where can I find more information about CVE-2019-17421?
References are available at: https://twitter.com/va_start, https://blog.vastart.dev/2019/11/cve-2019-17421-privilege-escalation.html, https://www.manageengine.com/products/firewall/security-updates/cve-2019-17421.html.