I was found that the fix present in RHEL-7.5 RHSA-2018:3507 for flaw CVE-2018-14648 was not sufficient. Other RHEL versions are not affected.
The CVE was partially fixed, following upstream fix was missing in the original RHEL-7.5 build : https://pagure.io/389-ds-base/c/722a6f8679
This issue has been addressed in the following products: Red Hat Enterprise Linux 7.5 Extended Update Support Via RHSA-2019:1789 https://access.redhat.com/errata/RHSA-2019:1789
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2019-10171