Ensure the OSS used to store ActionTrail logs is not publicly accessible

AltaNível 1Automatizadaalibaba

Descrição

ActionTrail logs a record of every API call made in your Alibaba Cloud account. These logs file are stored in an OSS bucket. It is recommended that the access control list (ACL) of the OSS bucket, which ActionTrail logs to, shall prevent public access to the ActionTrail logs. Allowing public access to ActionTrail log content may aid an adversary in identifying weaknesses in the affected account's use or configuration. Every OSS bucket that a trail delivers to (OssBucketName) must have ACL private (aliyun oss stat). 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.

Como é verificado

Método de auditoria: Comando shell

shell

out=$(aliyun actiontrail DescribeTrails 2>/dev/null) || exit 1
bs=$(printf '%s\n' "$out" | sed -n 's/.*"OssBucketName"[[:space:]]*:[[:space:]]*"\([^"]\{1,\}\)".*/\1/p' | sort -u)
bad=0
for b in $bs; do
  st=$(aliyun oss stat "oss://$b" 2>/dev/null) || exit 1
  acl=$(printf '%s\n' "$st" | sed -n 's/^[[:space:]]*ACL[[:space:]]*:[[:space:]]*\([^[:space:]]*\).*/\1/p' | head -n 1)
  [ "$acl" = private ] || { echo "trail bucket ACL $acl: $b"; bad=1; }
done
[ "$bad" -eq 0 ] && echo compliant

Saída esperada: compliant

Como é corrigido

Método de correção: Orientação ou patch de infraestrutura

aliyun oss set-acl oss://<bucket> private -b for each listed bucket and review its bucket policy for anonymous grants.

Propriedades

Sistemas operacionais: Qualquer
Tags: alibabalogging
Referência: CIS Alibaba Cloud Foundation Benchmark v2.0.1 - 2.2 Ensure the OSS used to store ActionTrail logs is not publicly accessible

Verificar este host

Execute isto em uma máquina que você tenha permissão para auditar. A varredura é somente leitura.

shell

tmaegis scan --target alibaba