V-269429

Discussion

AlmaLinux OS 9 systems handling data requiring "data at rest" protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest. Selection of a cryptographic mechanism is based on the need to protect the integrity of organizational information. The strength of the mechanism is commensurate with the security category and/or classification of the information. Organizations have the flexibility to either encrypt all information on storage devices (i.e., full disk encryption) or encrypt specific data structures (e.g., files, records, or fields). Satisfies: SRG-OS-000405-GPOS-00184, SRG-OS-000404-GPOS-00183, SRG-OS-000185-GPOS-00079

Check Content

Note: If there is a documented and approved reason for not having data-at-rest encryption at the operating system level, such as encryption provided by a hypervisor or a disk storage array in a virtualized environment, this requirement is Not Applicable.

Verify AlmaLinux OS 9 prevents unauthorized disclosure or modification of all information requiring at-rest protection by using disk encryption. 

Verify all system partitions are encrypted with the following command:

$ lsblk -e11 -oNAME,FSTYPE,FSVER,MOUNTPOINTS

NAME                                            FSTYPE      FSVER    MOUNTPOINTS
sda                                                                  
+-sda1                                          vfat        FAT16    /boot/efi
+-sda2                                          xfs                  /boot
+-sda3                                          LVM2_member LVM2 001 
  +-rootvg-root                                 crypto_LUKS 2        
  ¦ +-luks-8a7154ec-8eeb-46c8-9d75-66fc4b81d665 xfs                  /
  +-rootvg-swap                                 crypto_LUKS 2        
  ¦ +-luks-89bf0df8-547f-4613-af07-215e5f63e9a9 swap        1        [SWAP]
  +-rootvg-home                                 crypto_LUKS 2        
  ¦ +-luks-10a20c46-483d-4d12-831f-5328eda28fd1 xfs                  /home
  +-rootvg-varlogaudit                          crypto_LUKS 2        
  ¦ +-luks-29b74747-2f82-4472-82f5-0b5eb764effc xfs                  /var/log/audit
  +-rootvg-varlog                               crypto_LUKS 2        
  ¦ +-luks-e0d162f5-fad8-463e-8e39-6bd09e682961 xfs                  /var/log
  +-rootvg-vartmp                               crypto_LUKS 2        
  ¦ +-luks-0e7206e7-bfb1-4a23-ae14-b9cea7cf46d5 xfs                  /var/tmp
  +-rootvg-var                                  crypto_LUKS 2        
    +-luks-b23d8276-7844-4e79-8a58-505150b4eb42 xfs                  /var

Every persistent disk partition present must be of type "crypto_LUKS". If any partitions other than the /boot partitions are not type "crypto_LUKS", ask the administrator to indicate how the partitions are encrypted. If there is no evidence that these partitions are encrypted, this is a finding.