Ensure File Storage Systems are encrypted with Customer Managed Keys (CMK)

HighLevel 2Automatedoci

Description

Oracle Cloud Infrastructure File Storage service (FSS) provides a durable, scalable, secure, enterprise-grade network file system. By default, the Oracle service manages the keys that encrypt FSS file systems. FSS file systems can also be encrypted using a customer managed key. Encryption of FSS systems provides an additional level of security for your data. Management of encryption keys is critical to protecting and accessing protected data. Uses resource search for file systems in every subscribed region; each must have a non-empty kms-key-id. 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 "$t" ] || exit 1
bad=0
rs=$(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 $regions; do
  ids=$(oci search resource structured-search --region "$r" --query-text "query filesystem resources where lifeCycleState != 'TERMINATED' && lifeCycleState != 'DELETED'" --query 'data.items[].identifier' --raw-output 2>/dev/null) || exit 1
  for i in $(printf '%s\n' "$ids" | grep -o 'ocid1\.[a-z]*\.[^"]*'); do
    k=$(oci fs file-system get --file-system-id "$i" --region "$r" --query 'data."kms-key-id"' --raw-output 2>/dev/null) || exit 1
    [ -n "$k" ] && [ "$k" != null ] || { echo "Oracle-managed key: $r $i"; bad=1; }
  done
done
[ "$bad" -eq 0 ] && echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

oci fs file-system update --file-system-id <ocid> --kms-key-id <vault-key-ocid> for each listed file system.

Properties

Operating systems: Any
Tags: ocistorage
Reference: CIS Oracle Cloud Infrastructure Foundations Benchmark v3.1.1 - 5.3.1 Ensure File Storage Systems 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