The kernel core dump data directory must not have an extended ACL.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-22407	GEN003523	SV-26616r2_rule		Low

Description
Kernel core dumps may contain the full contents of system memory at the time of the crash. As the system memory may contain sensitive information, it must be protected accordingly. If there is an extended ACL for the kernel core dump data directory, unauthorized users may be able to view or to modify kernel core dump data files.

STIG	Date
Red Hat Enterprise Linux 5 Security Technical Implementation Guide	2016-12-16

Details

Check Text ( C-36352r2_chk )
Determine the kernel core dump data directory and check its permissions. Procedure: Verify the location of the kernel core dump data directory: # grep “path” /etc/kdump.conf Note: If this setting is not configured or commented out, the default kernel dump data directory is /var/crash. Check the permissions of the dump data directory: # ls -ld If the permissions include a '+', the directory has an extended ACL. If the directory has an extended ACL and it has not been documented with the ISSO, this is a finding.

Check Text ( C-36352r2_chk )

Determine the kernel core dump data directory and check its permissions.

Procedure:
Verify the location of the kernel core dump data directory:
# grep “path” /etc/kdump.conf

Note: If this setting is not configured or commented out, the default kernel dump data directory is /var/crash.

Check the permissions of the dump data directory:
# ls -ld

If the permissions include a '+', the directory has an extended ACL. If the directory has an extended ACL and it has not been documented with the ISSO, this is a finding.

Fix Text (F-23859r2_fix)
Remove the extended ACL from the directory. # setfacl --remove-all