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Security audit

Sonarbay News

Security checks for vulnerabilities and agentic risk

Overview

The skill’s news-search purpose is coherent, but its install instructions ask users to immediately execute mutable remote scripts without verification.

Install only if you trust SonarBay’s remote installer and update channel. Prefer the documented REST API when possible, or require a versioned installer with published checksums or signatures before running local code.

A.I.G

Vulnerability Patterns
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs
Findings (1)

T03 · Remote Payload Retrieval and Execution

Error
Location
SKILL.md:19
Finding

Unaudited Remote Installer Scripts Are Downloaded and Executed Directly

Content
View full analysis

Vulnerability Details

File Location: SKILL.md, lines 19-24
Vulnerability Type: Remote payload retrieval and execution
Risk Level: High

bash
# Mac/Linux
curl -fsSL https://sonarbay.com/install.sh | sh

# Windows (PowerShell)
irm https://sonarbay.com/install.ps1 | iex

Technical Analysis

The installation instructions pipe network responses directly into a shell or PowerShell interpreter. Neither command saves the installer for inspection nor verifies a pinned version, cryptographic checksum, or trusted digital signature before execution.

Although HTTPS provides transport protection, it does not establish that the returned script is safe. The effective payload is mutable and can change after this Skill has been reviewed. The installer source is not included in the project, so its commands, requested permissions, installed files, dependencies, and future behavior cannot be audited from the available artifact.

The Windows instruction has the same security properties as the Unix instruction: irm retrieves remote content and iex immediately evaluates it as PowerShell code.

This execution capability is not required for the Skill's core news-search functionality because SKILL.md also documents unauthenticated REST API endpoints that can provide search, trending, count, article, and status data without installing local executable code. The installer therefore exceeds the minimum privilege necessary for the declared functionality.

Attack Path

  1. A user or AI agent follows the installation instructions in SKILL.md.
  2. The command requests install.sh or install.ps1 from sonarbay.com.
  3. The domain, hosting account, web application, DNS path, delivery infrastructure, or installer publication process is compromised, or the publisher changes the mutable script.
  4. The server returns attacker-controlled shell or PowerShell instructions.
  5. sh or iex executes the response immediately without integrity verification or review ...[truncated 1305 chars]
Remediation
View remediation

Remediation Suggestions

  1. Remove the curl | sh and irm | iex installation patterns.
  2. Prefer the documented unauthenticated REST API when local installation is unnecessary.
  3. Publish the CLI and installer source in a version-controlled, auditable repository.
  4. Distribute immutable, version-pinned releases through established package managers or a trusted release channel.
  5. Require users to download the installer or package without executing it automatically.
  6. Publish a cryptographic checksum through an independently protected channel and require verification before execution.
  7. Digitally sign release artifacts and verify the signature against a documented, pinned publisher key.
  8. Provide explicit review and execution as separate steps, for example: download, verify, inspect, and only then run the local file.
  9. Document every installation path, file modification, network destination, update mechanism, and permission requirement.
  10. Ensure installation runs without administrative privileges unless a narrowly defined operation genuinely requires elevation.
  11. Pin update targets to signed releases rather than allowing an unaudited self-update to retrieve arbitrary latest code.

SkillSpector

Vulnerability Patterns
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
  • Rogue AgentSelf-Modification, Session Persistence
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (4)

External Script Fetching

High
Category
Supply Chain
Confidence
99% confidence
Finding

The command curl -fsSL https://sonarbay.com/install.sh | sh fetches code from the internet and immediately executes it in the shell. This creates a direct remote-code-execution path if the remote content is altered maliciously or intercepted through upstream compromise.

Content

Scanner excerpt · SKILL.md (reported line 21)May include surrounding context.

bash
# Mac/Linux
curl -fsSL https://sonarbay.com/install.sh | sh

# Windows (PowerShell)
irm https://sonarbay.com/install.ps1 | iex

Chaining Abuse

High
Category
Tool Misuse
Confidence
98% confidence
Finding

The | sh chaining pattern is inherently dangerous because it removes any opportunity to inspect the fetched content before execution and turns a network response into immediate shell commands. In this skill, the pattern appears in installation guidance, making exploitation straightforward if the remote source is compromised.

Content

Scanner excerpt · SKILL.md (reported line 21)May include surrounding context.

bash
# Mac/Linux
curl -fsSL https://sonarbay.com/install.sh | sh

# Windows (PowerShell)
irm https://sonarbay.com/install.ps1 | iex

Self-Modification

High
Category
Rogue Agent
Confidence
90% confidence
Finding

Documenting a self-update command encourages execution of code that can modify the installed tool outside normal review or pinning workflows. In an agent skill context, this is risky because an agent or user may invoke updates during operation, pulling new code whose behavior has not been vetted.

Content

Scanner excerpt · SKILL.md (reported line 72)May include surrounding context.

bash
sonarbay status          # Health check
sonarbay update          # Self-update to latest version
sonarbay --version       # Show version

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill includes installation instructions that execute remote scripts directly from the network without any integrity verification, pinning, or warning to the user. This is dangerous because compromise of the vendor site, CDN, DNS, TLS termination, or the install script itself would result in immediate arbitrary code execution on the host.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.