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-26616r1_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 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	2015-06-12

Details

Check Text ( C-36352r1_chk )
Determine the kernel core dump data directory and check its permissions. Procedure: Examine /etc/kdump.conf. The "path" parameter, which defaults to /var/crash, determines the path relative to the crash dump device. The crash device is specified with a filesystem type and device, such as "ext3 /dev/sda2". Using this information, determine where this path is currently mounted on the system. # ls -l If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Check Text ( C-36352r1_chk )

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

Procedure:
Examine /etc/kdump.conf. The "path" parameter, which defaults to /var/crash, determines the path relative to the crash dump device. The crash device is specified with a filesystem type and device, such as "ext3 /dev/sda2". Using this information, determine where this path is currently mounted on the system.
# ls -l
If the permissions include a '+', the file has an extended ACL. If the file has an extended ACL and it has not been documented with the IAO, this is a finding.

Fix Text (F-23859r1_fix)
Remove the extended ACL from the file. # setfacl --remove-all