[CentOS] Fix for CVE-2020-1971 on CentOS 6.10

Sat Dec 12 19:20:04 UTC 2020
Simon Matter <simon.matter at invoca.ch>


While many of us were busy lately with upgrading CentOS 6 systems to
CentOS 8, a lot of systems may still be running CentOS 6 and migrations
came to a halt this week with the announcement of RedHats new direction
for the CentOS project.

Since security updates for CentOS 6 are not provided anymore, I've decided
to try my best to address CVE-2020-1971 and I welcome others to do the
same for this and other new issues which may come up.

Attached patches:

Please let me know if you find any issues.