T05 · Unauthorized Access and Privilege Escalation
- Location
SKILL.md:23- Finding
Excessive Execution Privileges and Unsafe Elevation Guidance
- Content
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Vulnerability Details
File Location:
SKILL.md, lines 23–26; supporting guidance at lines 214, 226, and 265
Vulnerability Type: Excessive tool permissions and privilege-escalation guidance
Risk Level: MediumVulnerable Code Snippet
yaml tools: - read - exec - writeThe skill also states that it can execute system commands and recommends running with administrator privileges when permissions are insufficient:
text Command execution: execute system commands in a secure sandbox and collect results. If permissions are insufficient, check file permissions and run as administrator.Technical Analysis
The skill requests general-purpose
read,write, andexeccapabilities, although the package contains no implementation, executable script, defined command allowlist, or concrete processing workflow demonstrating why unrestricted command execution is necessary.The declared functionality concerns video translation, dubbing, and subtitle generation. These operations may legitimately require media-processing capabilities, but the skill does not constrain command execution to a specific binary, fixed argument schema, workspace, or set of approved input and output paths. Consequently, the permission model is broader than the documented task establishes.
The generic recommendation to run as administrator further weakens least-privilege boundaries. It treats elevation as a troubleshooting measure without identifying the exact resource that requires access or limiting the duration and scope of elevated privileges. Although the document advises against concatenating user input into commands, this control exists only as descriptive guidance and is not enforced by any implementation.
Attack Path
- An agent loads the skill and grants its declared
read,write, andexectools. - A user supplies a video path, URL, filename, language option, or other media-processing input.
- Because the skill defines no concrete imple ...[truncated 1571 chars]
- An agent loads the skill and grants its declared
- Remediation
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Remediation Suggestions
- Remove
execunless a concrete and documented media-processing implementation requires it. - Replace general-purpose execution with narrowly scoped media-processing tools or APIs.
- If command execution is unavoidable, define an explicit allowlist of permitted executables and subcommands.
- Pass user-controlled values through structured argument arrays rather than shell command strings.
- Reject shell metacharacters and validate language codes, paths, URLs, extensions, and file types against strict allowlists.
- Restrict file reads and writes to a dedicated workspace using canonical-path checks that prevent traversal and symlink escapes.
- Run processing under a dedicated unprivileged account with minimal filesystem and network permissions.
- Remove all generic advice to run as administrator. Document the exact minimum file or directory permission required instead.
- Enforce time, CPU, memory, output-size, and subprocess limits for media operations.
- Implement sandboxing as a technical control rather than relying on descriptive claims in
SKILL.md. - Document the exact external API endpoint and data-handling policy before permitting video uploads or network access.
- Add tests confirming that attacker-controlled filenames, paths, URLs, and language parameters cannot alter command structure or access files outside the approved workspace.
- Remove
