Ensure automatic rotation is enabled for customer created symmetric KMS keys

MediumLevel 2Automatedalibaba

Description

Automatic rotation limits the amount of data protected by one key version. In the profile's region, every Enabled symmetric (Aliyun_AES_256 / Aliyun_SM4) key created by the account must have AutomaticRotation Enabled; service-created default keys are skipped. Read-only aliyun CLI calls; credentials and default region come from the CLI's normal profile (aliyun configure, ~/.aliyun/config.json or ALIBABA_CLOUD_* environment variables). JSON output is parsed with grep/sed/awk. A missing CLI or credential fails the check.

How it is checked

Audit method: Shell command

shell

out=$(aliyun kms ListKeys --PageSize 100 2>/dev/null) || exit 1
keys=$(printf '%s\n' "$out" | sed -n 's/.*"KeyId"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p')
get() { printf '%s\n' "$m" | sed -n "s/.*\"$1\"[[:space:]]*:[[:space:]]*\"\([^\"]*\)\".*/\1/p" | head -n 1; }
bad=0
for k in $keys; do
  m=$(aliyun kms DescribeKey --KeyId "$k" 2>/dev/null) || exit 1
  case "$(get KeySpec)" in ''|Aliyun_AES_256|Aliyun_SM4) ;; *) continue ;; esac
  [ "$(get KeyState)" = Enabled ] || continue
  case "$(get Creator)" in ''|*[!0-9]*) continue ;; esac
  [ "$(get AutomaticRotation)" = Enabled ] || { echo "rotation off: $k"; bad=1; }
done
[ "$bad" -eq 0 ] && echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

aliyun kms UpdateRotationPolicy --KeyId <key-id> --EnableAutomaticRotation true --RotationInterval 31536000s (or a shorter interval) for each listed key.

Properties

Operating systems: Any
Tags: alibabakms
Reference: CIS Alibaba Cloud Foundation Benchmark - Logging and Monitoring - KMS key rotation (verify section number for your release)

Check this host

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

shell

tmaegis scan --target alibaba --level 2