Maxim Shpakov:
You can use oracle linux 6 , it is still supported (till March 2021)
Looks like Oracle's el6 sudo update is now available:
https://yum.oracle.com/repo/OracleLinux/OL6/latest/x86_64/getPackage/sudo-1.... https://yum.oracle.com/repo/OracleLinux/OL6/latest/i386/getPackage/sudo-1.8.... http://oss.oracle.com/ol6/SRPMS-updates/sudo-1.8.6p3-29.0.2.el6_10.3.src.rpm
* Tue Jan 26 2021 Qing Lin qing.lin@oracle.com - 1.8.6p3-29.0.2.el6_10.3 - backport the fix CVE-2021-3156.patch from ol7.
James Pearson