The kernel core dump data directory must be owned by root.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-11997	GEN003520	SV-38861r1_rule	ECLP-1	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 the kernel core dump data directory is not owned by root, the core dumps contained in the directory may be subject to unauthorized access.

STIG	Date
Draft AIX Security Technical Implementation Guide	2011-08-17

Details

Check Text ( C-37854r1_chk )
Determine the core file copy location. #sysdumpdev –l \| grep –i”core dir” Check the ownership of the kernel core dump data directory. # ls -ld < dump file location > If the kernel core dump data directory is not owned by root, this is a finding. Supplementary Information: The location of the kernel dump area should be moved out of /var/adm/ras. This directory may be world read/writeable. A suggestion would be to create /var/adm/kcore; chown root:sys /var/adm/kcore; chmod 700 /var/adm/kcore. Change where the system copies its kernel core files to. sysdumpdev –d /var/adm/kcore

Check Text ( C-37854r1_chk )

Determine the core file copy location.
#sysdumpdev –l | grep –i”core dir”

Check the ownership of the kernel core dump data directory.
# ls -ld < dump file location >
If the kernel core dump data directory is not owned by root, this is a finding.

Supplementary Information: The location of the kernel dump area should be moved out of /var/adm/ras. This directory may be world read/writeable. A suggestion would be to create /var/adm/kcore; chown root:sys /var/adm/kcore; chmod 700 /var/adm/kcore.
Change where the system copies its kernel core files to.
sysdumpdev –d /var/adm/kcore

Fix Text (F-33116r1_fix)
Change the owner of the kernel core dump data directory to root. # chown root /var/adm/ras