OL 9 must disable core dumps for all users.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-271731	SRG-OS-000480-GPOS-00227	OL09-00-002383	SV-271731r1155302_rule	2025-12-22	1

Description
A core dump includes a memory image taken at the time the operating system terminates an application. The memory image could contain sensitive data and is generally useful only for developers trying to debug problems.

ℹ️ Check
Note: If kernel dumps are disabled in accordance with OL09-00-002380, this requirement is not applicable. Verify OL 9 disables core dumps for all users by issuing the following command: $ grep -r -s core /etc/security/limits.conf /etc/security/limits.d/.conf /etc/security/limits.conf: hard core 0 This can be set as a global domain (with the * wildcard) but may be set differently for multiple domains. If the "core" item is missing or commented out, or the value is anything other than "0", and the need for core dumps is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "core" item assigned, this is a finding. If entries exist for users or groups with a value set to anything other than "0", this is a finding.

ℹ️ Check

Note: If kernel dumps are disabled in accordance with OL09-00-002380, this requirement is not applicable. Verify OL 9 disables core dumps for all users by issuing the following command: $ grep -r -s core /etc/security/limits.conf /etc/security/limits.d/*.conf /etc/security/limits.conf:* hard core 0 This can be set as a global domain (with the * wildcard) but may be set differently for multiple domains. If the "core" item is missing or commented out, or the value is anything other than "0", and the need for core dumps is not documented with the information system security officer (ISSO) as an operational requirement for all domains that have the "core" item assigned, this is a finding. If entries exist for users or groups with a value set to anything other than "0", this is a finding.

✔️ Fix
Configure OL 9 to disable core dumps for all users. Add the following line to the top of the /etc/security/limits.conf or in a single ".conf" file defined in /etc/security/limits.d/: * hard core 0 Remove or comment out any entries for users or groups with a value set to anything other than "0".