Perl might allow context-dependent attackers to bypass the taint protection mechanism in a child process via duplicate environment variables in envp.
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/security-alerts/cpuapr2020.html
https://security.gentoo.org/glsa/201701-75
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731
http://www.ubuntu.com/usn/USN-2916-1
http://www.securityfocus.com/bid/83802
http://www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.gossamer-threads.com/lists/perl/porters/326387
http://www.debian.org/security/2016/dsa-3501
http://perl5.git.perl.org/perl.git/commitdiff/ae37b791a73a9e78dedb89fb2429d2628cf58076
http://lists.opensuse.org/opensuse-updates/2016-03/msg00112.html