Ensure RAM policies that allow full ":" administrative privileges are not created

HighLevel 1Automatedalibaba

Description

RAM policies represent permissions that can be granted to users, groups, or roles. It is recommended and considered a standard security advice to grant least privilege-that is, granting only the permissions required to perform tasks. It is more secure to start with a minimum set of permissions and grant additional permissions as necessary, rather than starting with permissions that exceed the necessity and then trying to tighten them later. Flags custom policies with AttachmentCount > 0 whose default version has a statement with Effect Allow, Action "*" and Resource "*". 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 sed/awk. A missing CLI or credential fails the check.

How it is checked

Audit method: Shell command

shell

out=$(aliyun ram ListPolicies --PolicyType Custom --MaxItems 1000 2>/dev/null) || exit 1
pols=$(printf '%s\n' "$out" | sed -n 's/.*"PolicyName"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' | sort -u)
bad=0
for p in $pols; do
  g=$(aliyun ram GetPolicy --PolicyName "$p" --PolicyType Custom 2>/dev/null) || exit 1
  n=$(printf '%s\n' "$g" | sed -n 's/.*"AttachmentCount"[[:space:]]*:[[:space:]]*\([0-9]\{1,\}\).*/\1/p' | head -n 1)
  [ "${n:-0}" -gt 0 ] || continue
  doc=$(printf '%s\n' "$g" | grep '"PolicyDocument"' | head -n 1 | sed 's/\\n//g; s/\\t//g; s/\\"/"/g' | tr -d ' \t')
  if printf '%s\n' "$doc" | tr '{}' '\n\n' | grep '"Effect":"Allow"' | grep -E '"Action":(\["\*"\]|"\*")' | grep -Eq '"Resource":(\["\*"\]|"\*")'; then
    echo "attached full-admin policy: $p"; bad=1
  fi
done
[ "$bad" -eq 0 ] && echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Detach the listed policies from all identities (aliyun ram DetachPolicyFromUser/Group/Role) and replace them with least-privilege policies; use the system AdministratorAccess policy only for a small, controlled group.

Properties

Operating systems: Any
Tags: alibabaram
Reference: CIS Alibaba Cloud Foundation Benchmark v2.0.1 - 1.15 Ensure RAM policies that allow full "*:*" administrative privileges are not created

Check this host

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