T03 · Remote Payload Retrieval and Execution
Error
- Location
SKILL.md:24- Finding
Unverified Remote Installation Script Executed Directly by Bash
- Content
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**Pre-check: Aliyun CLI >= 3.3.3 required** > Run `aliyun version` to verify >= 3.3.3. If not installed or version too low, > run `curl -fsSL https://aliyuncli.alicdn.com/setup.sh | bash` to update, > or see [references/cli-installation-guide.md](references/cli-installation-guide.md) for installation instructions. ``` ### Technical Analysis The command pipes a mutable HTTPS response directly into Bash without first saving, inspecting, or validating it. There is no pinned version, cryptographic checksum, or publisher-signature verification. Although the URL appears associated with the Aliyun CLI distribution domain, domain reputation alone does not establish the integrity of the response at execution time. Compromise of the hosting infrastructure, distribution pipeline, DNS resolution, TLS trust chain, or upstream script could alter the effective payload after the Skill has been reviewed. Installing or updating the CLI may be necessary, but immediate execution of an unverified remote script is not the minimum privilege or minimum-risk mechanism required to support the Skill's read-only DataWorks queries. ### Attack Path 1. The Skill is activated on a system where Aliyun CLI is missing or older than version 3.3.3. 2. The Agent or user follows the prescribed installation command. 3. `curl` retrieves the current response from the remote URL. 4. The response is passed directly to Bash without integrity verification. 5. If the response has been compromised, arbitrary commands execute with the privileges of the Agent or user. 6. The payload could inspect local cloud configuration, steal credentials, replace executables, modify files, or establish persistence. ### Impact Assessment Successful exploitation provides arbitrary code execution under the accoun ...[truncated 291 chars]- Remediation
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