Vulnerability Discussion
It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements or mission objectives. These unnecessary capabilities or services are often overlooked and therefore may remain unsecured. They increase the risk to the platform by providing additional attack vectors.
Check
Verify that OL 8 disables storing core dumps with the following commands:
$ sudo sysctl kernel.core_pattern
kernel.core_pattern = |/bin/false
If the returned line does not have a value of "|/bin/false", or a line is not returned and the need for core dumps is not documented with the Information System Security Officer (ISSO) as an operational requirement, this is a finding.
Fix
Configure OL 8 to disable storing core dumps by adding the following line to a file in the "/etc/sysctl.d" directory:
kernel.core_pattern = |/bin/false
The system configuration files must be reloaded for the changes to take effect. To reload the contents of the files, run the following command:
$ sudo sysctl --system