Provide references for CVE-2016-20013.
Where can I find more information about CVE-2016-20013?
References are available at: https://twitter.com/solardiz/status/795601240151457793, https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/, https://akkadia.org/drepper/SHA-crypt.txt.