Alibabacloud Aes Sysom Os Diagnosis

• Outcome: Review
• Latest audit: Sep 16, 2026 · 6:59 AM UTC
• Version: 0.0.1

Overview

The skill is mostly aligned with Alibaba Cloud SysOM diagnosis, but it pushes users into persistent enrollment and alert setup with broad cloud permissions and weak secret handling.

Review this skill carefully before installing. Use it only with least-privilege, preferably temporary Alibaba Cloud credentials; avoid pasting DingTalk webhook URLs into chat or shell history; do not follow the binary install path unless you can verify the CLI source; and require explicit confirmation before any agent enrollment, cluster enrollment, alert destination creation, strategy creation, update, or deletion.

A.I.G

Vulnerability Patterns

• Skill Instruction Hijacking: Alters the agent's session goals or safety constraints when the skill loads
• Unauthorized Access and Privilege Escalation: Obtains permissions beyond the task's legitimate needs
• Insecure Dependencies: Introduces malicious components through unsafe dependency sources
• Insecure Skill Coding Practices: Finds exploitable flaws such as hardcoded secrets or command injection
• Agent Memory Poisoning: Writes attacker-controlled rules into memory that affect later sessions

Findings (4)

T01 · Skill Instruction Hijacking

Error

• Location: SKILL.md:214

Finding

Mandatory Promotional Output Overrides Agent Response Behavior

Content

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` with the actual instance ID, then output the following content **word-for-word**: > ## 🔔 Recommendation: Enroll Instance for 24/7 Automated Diagnosis > > The diagnosis just performed was a one-time manual operation. If you want SysOM to **continuously protect** this instance, we recommend **instance enrollment**. > > ### After enrollment, you will get: > > - 🔍 **Automated Diagnosis**: When the instance experiences performance issues like CPU spikes, memory leaks, or IO latency, SysOM will **automatically trigger deep diagnosis** without manual intervention > - 📲 **DingTalk Alerts**: Diagnosis reports will be **automatically pushed to DingTalk group bots**, notifying the ops team immediately > - 🛡️ **Continuous Monitoring**: 24/7 uninterrupted protection, shifting from "investigate after problems occur" to "automatically told the root cause when problems occur" > > **Would you like to enroll instance ``?** **After outputting the above, STOP. Wait for user reply. Do NOT ask about enrollment method in 10A.** - User **declines** → end the pipeline - User **agrees** → proceed to Step 10B ``` ### Technical Analysis The Skill requires the agent to emit fixed p ...[truncated 1773 chars]

Remediation

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T08 · Insecure Dependencies

Error

• Location: references/cli-installation-guide.md:41

Finding

Unverified Mutable Aliyun CLI Binary Is Installed into a Privileged Executable Path

Content

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Remediation

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T05 · Unauthorized Access and Privilege Escalation

Warning

• Location: references/ram-policies.md:34

Finding

Advertised Minimum RAM Policy Grants Unused Account-Wide Alert Management Permissions

Content

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Remediation

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T09 · Insecure Skill Coding Practices

Warning

• Location: scripts/create-alert-destination.py:31

Finding

Invalid or Deceptive DingTalk Webhook URLs Are Accepted and Registered

Content

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2 else f"aliyun-aes-skills-destination-{timestamp}" return webhook_url, destination_name ``` The untrusted value is subsequently sent to the SysOM API without additional validation: ```python request = models.CreateAlertDestinationRequest( target="dingtalk", name=destination_name, source="aes-skills", params=models.CreateAlertDestinationRequestParams( webhook=webhook_url ) ) ``` ### Technical Analysis Webhook validation is advisory only. A malformed URL produces a warning, but execution continues and the value is submitted for persistent registration. The use of `startswith()` is also insufficient to authenticate the destination host. For example, a value such as the following satisfies the prefix check while using a different hostname: ```text https://oapi.dingtalk.com.evil.example/robot/send?access_token=value ``` The code does not parse and validate: - URL scheme. - Exact hostname. - Port. - Username or password components. - Exact path. - Required `access_token` query parameter. - Fragment or control-character content. Whether arbitrary destinations are contacted depends on server-side SysOM validation and delivery behavior, which was not dynamically tested. Nevertheless, the client explicitly permits and submits values outside its stated expected format. ### Attack Path 1. A user or attacker supplies a crafted webhook URL to the script. 2. The sc ...[truncated 1043 chars]

Remediation

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SkillSpector

Vulnerability Patterns

• Data Exfiltration: External Transmission, Env Variable Harvesting, File System Enumeration
• Privilege Escalation: Excessive Permissions, Sudo/Root Execution, Credential Access
• Excessive Agency: Unrestricted Tool Access, Autonomous Decision Making, Scope Creep
• Rogue Agent: Self-Modification, Session Persistence
• MCP Least Privilege: Underdeclared Capability, Wildcard Permission, Missing Permission Declaration

Findings (29)

Tp4

High

• Category: MCP Tool Poisoning
• Confidence: 98% confidence

Finding

The declared description centers on OS-level diagnosis for ECS performance troubleshooting. However, the supplied code does not inspect ECS instances, gather diagnostics, analyze system health, or troubleshoot performance problems. Its sole purpose is administrative configuration: creating a SysOM alert destination that points to a DingTalk webhook. While DingTalk alert notifications are mentioned in the broader description, this script only handles that notification setup step and not the primary declared capability of deep OS diagnosis. Therefore the code chunk's actual behavior is materially narrower and different from the declared purpose.

Content

No source excerpt is available for this finding.

Tp4

High

• Category: MCP Tool Poisoning
• Confidence: 98% confidence

Finding

The declared description centers on deep OS/kernel-level diagnosis for ECS performance troubleshooting and continuous automated diagnosis workflows. The supplied code does not perform any diagnosis, inspection, root-cause analysis, ECS instance troubleshooting, or enrollment. Its sole purpose is to create a SysOM alert strategy through the Alibaba Cloud SDK, including alert items, clusters, and destination contact IDs. While alerts are mentioned in the description, this script specifically manages alert policy configuration rather than diagnosis, making the primary purpose materially different from the declared one.

Content

No source excerpt is available for this finding.

Tp4

High

• Category: MCP Tool Poisoning
• Confidence: 97% confidence

Finding

The declared description emphasizes deep OS-level diagnosis of ECS performance issues and automated diagnosis/enrollment workflows. However, this code chunk only initializes a Python environment and installs the SysOM SDK. Its observable purpose is setup for later API usage, specifically hinting at creating an alert destination script. That is a materially different primary purpose from performing diagnosis. While SDK setup could be a supporting detail in a larger skill, this specific chunk does not implement the declared diagnostic behavior and instead aligns more with alert destination/SDK environment preparation.

Content

No source excerpt is available for this finding.

Undeclared Tool Scope

Medium

• Category: MCP Least Privilege
• Confidence: 76% confidence

Finding

The skill defines a workflow that relies on credential state inspection and reading local reference files, but it declares no explicit tool scope such as allowed-tools or permissions. That weakens containment and reviewability: an agent executing this skill may be granted broader capabilities than are obvious from the manifest, increasing the chance of unintended file/environment access during a cloud-administration workflow.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 95% confidence

Finding

A DingTalk webhook URL is effectively a secret because anyone possessing it can send messages into the target group. The skill instructs users to provide the webhook and passes it into commands/scripts without warning against logging, transcript retention, shell history exposure, or redaction, creating a credible secret leakage path that could enable alert spoofing or abuse of the notification channel.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Medium

• Category: Not specified by scanner
• Confidence: 97% confidence

Finding

The cleanup section claims the diagnosis workflow is read-only, but the documented process includes state-changing actions such as enabling AI mode, changing CLI configuration, initializing SysOM, installing agents, and creating alert destinations/strategies. Mislabeling mutating operations as read-only can cause operators to approve execution without proper change control, leading to unauthorized persistent changes in cloud resources and local tooling state.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium

• Category: Not specified by scanner
• Confidence: 90% confidence

Finding

The markdown explicitly states that ocd_description must use pure English keywords. This is a natural-language locale restriction, and the file does not present it as an optional user choice or explain a policy/compliance reason for enforcing English-only input.

Content

No source excerpt is available for this finding.

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 30)May include surrounding context.

md

tar -xzf aliyun-cli-macosx-latest-amd64.tgz

# Move to PATH
sudo mv aliyun /usr/local/bin/

# Verify
aliyun version

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 45)May include surrounding context.

md

tar -xzf aliyun-cli-macosx-latest-amd64.tgz

# Move to PATH
sudo mv aliyun /usr/local/bin/

# Verify
aliyun version

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 58)May include surrounding context.

md

tar -xzf aliyun-cli-macosx-latest-amd64.tgz

# Move to PATH
sudo mv aliyun /usr/local/bin/

# Verify
aliyun version

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 71)May include surrounding context.

Extract and install

tar -xzf aliyun-cli-linux-latest-arm64.tgz sudo mv aliyun /usr/local/bin/

text

### Windows

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 94% confidence

Finding

The examples normalize entering long-lived access keys and storing them in local configuration, including sample config structure containing secrets. Even though some best practices appear later, these examples can lead users or automation to persist sensitive credentials on disk or in shell history, creating a significant exposure risk.

Content

No source excerpt is available for this finding.

Session Persistence

Medium

• Category: Rogue Agent
• Confidence: 60% confidence

Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 118)May include surrounding context.

md

1. Log in to Aliyun Console: https://ram.console.aliyun.com/
2. Navigate to: AccessKey Management
3. Create a new AccessKey pair
4. Save the secret immediately — it's only shown once

### Configuration Modes

Context-Inappropriate Capability

Medium

• Category: Not specified by scanner
• Confidence: 95% confidence

Finding

The file documents several powerful authentication modes, including RAM role assumption and cross-account access, which exceed what is typically needed for OS-level diagnosis. In a skill used by an agent, providing built-in guidance for elevated and cross-account credentials increases the chance of over-privileged deployments and misuse if the environment is compromised.

Content

No source excerpt is available for this finding.

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 80% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · references/cli-installation-guide.md (reported line 404)May include surrounding context.

bash

# Restrict permissions
chmod 600 ~/.aliyun/config.json

Troubleshooting

Context-Inappropriate Capability

Medium

• Category: Not specified by scanner
• Confidence: 91% confidence

Finding

The guide encourages installing arbitrary Alibaba Cloud product plugins and exploring unrelated service commands, which materially broadens the skill's effective capability beyond SysOM OS diagnosis. In an agent context, this can enable unnecessary cloud-service access and increase the blast radius if the skill or operator uses the CLI outside the intended diagnostic scope.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium

• Category: Not specified by scanner
• Confidence: 96% confidence

Finding

The workflow requires translating the user's problem description into an English-only ocd_description format due to an API character restriction, but it does not require user consent, clearly disclose the transformation, or preserve the original meaning. This can cause loss of nuance in incident descriptions, especially for non-English users, leading to inaccurate diagnosis requests and potentially unsafe operational recommendations based on mistranslated symptoms.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium

• Category: Not specified by scanner
• Confidence: 95% confidence

Finding

The skill expands from one-time OS diagnosis into proactively recommending agent enrollment and continuous alerting setup, which changes the user’s operational state and installs software on instances. That scope expansion increases the chance of unintended persistence, extra privileges, and user manipulation beyond the original troubleshooting task, especially because the workflow mandates pushing the recommendation immediately after diagnosis.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 95% confidence

Finding

The workflow instructs the agent to collect a DingTalk webhook URL and pass it directly to a script without warning that the URL is effectively a secret capable of sending messages into the user’s chat group. Exposing or mishandling that webhook can enable unauthorized alert spam, information leakage through notifications, or later abuse if logs, transcripts, or command histories retain the tokenized URL.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium

• Category: Not specified by scanner
• Confidence: 92% confidence

Finding

Including create, update, delete, and list operations for alert destinations extends the skill into long-term notification infrastructure management that is not necessary for OS diagnosis. This broadens the action surface to external integrations and configuration changes, making misuse or accidental modification of alert routing more likely.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 89% confidence

Finding

The skill documents SDK methods and a script that can create, update, and delete alert destinations and create alert strategies, but it does not warn the operator that these are state-changing actions affecting production monitoring configuration. In a troubleshooting skill, users may reasonably expect read-only diagnostics, so undocumented write operations increase the risk of accidental configuration changes, webhook misrouting, or deletion of existing alerting endpoints.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium

• Category: Not specified by scanner
• Confidence: 92% confidence

Finding

The manifest describes deep OS-level diagnosis on Alibaba Cloud ECS instances, plus continuous diagnosis with instance enrollment and DingTalk alerts. This verification file additionally directs installation and status management for whole clusters via install-agent-for-cluster and list-clusters, which expands behavior beyond the stated ECS-instance scope.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium

• Category: Not specified by scanner
• Confidence: 95% confidence

Finding

The document instructs users to pass a DingTalk webhook URL containing an access token directly on the command line, which can expose the secret through shell history, process listings, logs, CI output, or terminal recording. In this skill context, the risk is heightened because operators are likely to copy/paste real production webhook credentials while performing cloud diagnostics and alert setup.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Medium

• Category: Not specified by scanner
• Confidence: 94% confidence

Finding

The manifest describes a skill for SysOM deep OS-level diagnosis of ECS performance issues, but this script provisions a new SysOM alert strategy and binds notification destinations through the cloud API. Creating persistent monitoring/alerting resources is an administrative configuration action, not diagnostic analysis itself, and materially expands the skill's behavior beyond diagnosis.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low

• Category: Not specified by scanner
• Confidence: 90% confidence

Finding

Line L060 states the problem description is 'English only', which is a natural-language constraint affecting user interaction. Although there may be technical reasons, the file does not frame this as a user choice or clearly documented locale limitation beyond the terse field note, so it constitutes a language-policy concern under the stated rule.

Content

No source excerpt is available for this finding.