| Name | CVE-2016-20013 |
| Description | sha256crypt and sha512crypt through 0.6 allow attackers to cause a denial of service (CPU consumption) because the algorithm's runtime is proportional to the square of the length of the password. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
https://akkadia.org/drepper/SHA-crypt.txt
https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/
https://twitter.com/solardiz/status/795601240151457793
Inherent algorithmic flaw, applications can set password limits or instead use a
different hashing algorithm