The system's boot loader configuration file(s) must not have extended ACLs.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-220127	GEN008740	SV-220127r603266_rule		Medium

Description
File system extended ACLs provide access to files beyond what is allowed by the mode numbers of the files. If extended ACLs are present on the system's boot loader configuration file(s), these files may be vulnerable to unauthorized access or modification, which could compromise the system's boot process.

STIG	Date
Solaris 10 X86 Security Technical Implementation Guide	2020-12-04

Details

Check Text ( C-36434r602905_chk )
This check applies to the global zone only. Determine the type zone that you are currently securing. # zonename If the command output is "global", this check applies. On systems that have a ZFS root, the active menu.lst file is typically located at /pool-name/boot/grub/menu.lst where "pool-name" is the mount point for the top-level dataset. On systems that have a UFS root, the active menu.lst file is typically located at /boot/grub/menu.lst. To locate the active GRUB menu, use the bootadm command with the list-menu option: # bootadm list-menu Check the permissions of the menu.lst file. Procedure: # ls -lL /pool-name/boot/grub/menu.lst or # ls -lL /boot/grub/menu.lst If the permissions of the menu.lst file contain "+", an extended ACL is present, and this is a finding.

Check Text ( C-36434r602905_chk )

This check applies to the global zone only. Determine the type zone that you are currently securing.

# zonename

If the command output is "global", this check applies.

On systems that have a ZFS root, the active menu.lst file is typically located at /pool-name/boot/grub/menu.lst where "pool-name" is the mount point for the top-level dataset.

On systems that have a UFS root, the active menu.lst file is typically located at /boot/grub/menu.lst. To locate the active GRUB menu, use the bootadm command with the list-menu option:

# bootadm list-menu

Check the permissions of the menu.lst file.

Procedure:
# ls -lL /pool-name/boot/grub/menu.lst
or
# ls -lL /boot/grub/menu.lst

If the permissions of the menu.lst file contain "+", an extended ACL is present, and this is a finding.

Fix Text (F-36398r602906_fix)
If the file with the extended ACL resides on a UFS filesystem: # getfacl /boot/grub/menu.lst Remove each ACE from the file. # setfacl -r [ACE] /boot/grub/menu.lst If the file with the extended ACL resides on a ZFS filesystem: # chmod A- /pool-name/boot/grub/menu.lst