T03 · Remote Payload Retrieval and Execution
Error
- Location
SKILL.md:21- Finding
Unverified Remote Installer Is Piped Directly into Bash
- Content
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= 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, ``` ### Technical Analysis The installation instruction downloads a mutable shell script and immediately passes it to Bash. The retrieved content is not pinned to a reviewed version and is not checked using a cryptographic signature or published checksum before execution. HTTPS protects the connection in transit but does not establish that the current response is identical to the artifact reviewed during this audit. Compromise of the origin, CDN, DNS resolution, certificate infrastructure, or vendor publishing account could cause arbitrary shell commands to be returned and executed. The referenced hostname appears related to Alibaba Cloud, but source reputation does not eliminate the risks inherent in executing an unverified, mutable network response. ### Attack Path 1. The Skill is activated on a system without the required CLI version. 2. The agent or user follows the documented update instruction. 3. An attacker compromises or otherwise influences the remote script distribution channel. 4. `curl` retrieves the attacker-controlled response. 5. Bash executes the response immediately without inspection or integrity verification. 6. The payload runs with all operating-system privileges available to the invoking agent or user. ### Impact Assessment Successful exploitation provides arbitrary local command execution with the privileges of the invoking process. Depending on those privileges and the host configuration, this may permit: - Reading or modifying files accessible to the user. - Accessing locally configured cloud credentials. - Modifying CLI configuration or in ...[truncated 148 chars]- Remediation
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