Amazon Linux 2 : patch (ALAS-2019-1317)

doedscript in pch.c in GNU patch through 2.7.6 does not block strings beginning with a ! character. NOTE: this is the same commit as for CVE-2019-13638 , but the ! syntax is specific to ed, and is unrelated to a shell metacharacter.CVE-2018-20969 GNU patch through 2.7.6 is vulnerable to OS shell...