Ensure Block Volumes are encrypted with Customer Managed Keys (CMK).

HighLevel 2Automatedoci

Description

Oracle Cloud Infrastructure Block Volume service lets you dynamically provision and manage block storage volumes. By default, the Oracle service manages the keys that encrypt block volumes. Block Volumes can also be encrypted using a customer managed key. Encryption of block volumes provides an additional level of security for your data. Management of encryption keys is critical to protecting and accessing protected data. Flags block volumes without a kms-key-id. Covers every subscribed region and every accessible compartment. Read-only OCI CLI calls; credentials and home region come from the CLI's normal configuration (~/.oci/config, OCI_CLI_PROFILE, OCI_CLI_AUTH). The tenancy OCID is taken from OCI_TENANCY or the first tenancy= line of the config file. A missing CLI or credential fails the check.

How it is checked

Audit method: Shell command

shell

t=${OCI_TENANCY:-$(sed -n 's/^[[:space:]]*tenancy[[:space:]]*=[[:space:]]*//p' "${OCI_CLI_CONFIG_FILE:-$HOME/.oci/config}" 2>/dev/null | head -n 1 | tr -d '\r[:space:]')}
[ -n "$t" ] || exit 1
bad=0
cs=$(oci iam compartment list --compartment-id "$t" --compartment-id-in-subtree true --access-level ACCESSIBLE --all --query 'data[?"lifecycle-state"==`"ACTIVE"`].id' --raw-output 2>/dev/null) || exit 1
comps="$t $(printf '%s\n' "$cs" | grep -o 'ocid1\.compartment\.[^"]*')"
rs=$(oci iam region-subscription list --tenancy-id "$t" --query 'data[?status==`"READY"`]."region-name"' --raw-output 2>/dev/null) || exit 1
regions=$(printf '%s\n' "$rs" | grep -o '"[a-z0-9-]*"' | tr -d '"')
[ -n "$regions" ] || exit 1
for r in $regions; do
  for c in $comps; do
    out=$(oci bv volume list --compartment-id "$c" --region "$r" --all --query 'data[?"lifecycle-state"!=`"TERMINATED"` && "kms-key-id"==`null`]."display-name"' --raw-output 2>/dev/null) || exit 1
    printf '%s\n' "$out" | grep -q '"' && { printf '%s\n' "$out" | grep '"' | sed "s|^|$r |"; bad=1; }
  done
done
[ "$bad" -eq 0 ] && echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

oci bv volume-kms-key update --volume-id <ocid> --kms-key-id <vault-key-ocid> for each listed block volume.

Properties

Operating systems: Any
Tags: ocistorage
Reference: CIS Oracle Cloud Infrastructure Foundations Benchmark v3.1.1 - 5.2.1 Ensure Block Volumes are encrypted with Customer Managed Keys (CMK).

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target oci --level 2