T05 · Unauthorized Access and Privilege Escalation
- Location
SKILL.md:21- Finding
Overbroad Tool Permissions and Execution of an Unverified External Command
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 21–24; related execution instructions at lines 57 and 136
Vulnerability Type: Excessive tool authority and execution of an unspecified external program
Risk Level: MediumVulnerable Code
yaml tools: - read - exec - writeThe requested execution capability is used as follows:
bash dashboard start 3853The skill is also explicitly classified as execution-enabled:
text MD+execute()Technical Analysis
The skill requests unrestricted file-reading, file-writing, and command-execution capabilities even though its documented primary operation is starting and viewing a local dashboard. It does not define filesystem boundaries, an executable allowlist, permitted arguments, network destinations, or restrictions on data that the dashboard may access.
The invoked
dashboardexecutable is not included in the audited project, and no package manifest, source code, checksum, installation source, or pinned version is provided. Consequently, the effective behavior depends on whichever executable nameddashboardis resolved from the host'sPATH. Its behavior cannot be verified from this project.This violates least-privilege principles because an agent loading the skill may grant access that exceeds the narrowly documented dashboard-starting task. The issue does not prove that the skill itself contains a malicious payload, but it creates an unsafe privilege boundary and an execution channel whose implementation is outside the reviewed artifact.
Attack Path
- A user or agent loads the skill and grants the declared
read,write, andexectools. - The skill directs the agent to execute
dashboard start 3853. - The operating system resolves
dashboardfrom the current environment'sPATH. - An untrusted, compromised, or unexpectedly installed executable with that name runs with the privileges of the age ...[truncated 1370 chars]
- A user or agent loads the skill and grants the declared
- Remediation
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Remediation Suggestions
- Remove the
writecapability unless the dashboard has a documented and essential need to create or modify files. - Replace generic
execaccess with a narrowly scoped command allowlist permitting only the required executable and subcommand. - Resolve the executable through a fixed, trusted absolute path rather than relying on
PATH. - Include the dashboard implementation in the reviewed package, or document a trusted installation source and pin its exact version and cryptographic checksum.
- Validate the port as an integer within an approved range and prohibit additional shell arguments, metacharacters, or command substitution.
- Run the dashboard under a dedicated, least-privileged account or sandbox with explicit filesystem and network restrictions.
- Bind the service explicitly to
127.0.0.1or::1unless remote access is required and securely authenticated. - Document all permitted filesystem paths, network destinations, environment variables, and data flows.
- Add authentication and authorization controls before allowing access from any non-loopback interface.
- Provide auditable source code or a dependency manifest so the dashboard's handling of files, credentials, network traffic, and commands can be independently reviewed.
- Remove the
