T09 · Insecure Skill Coding Practices
- Location
SKILL.md:253- Finding
Malformed Fail-Open Security Scanner Produces Unreliable Audit Results
- Content
View full analysis
Vulnerability Details
File Location:
SKILL.md, lines 253–266
Vulnerability Type: Malformed scanner implementation and silent error handling
Risk Level: Highpython def _scan_file(self, filepath): """扫描单个文件""" self.files_scanned += 1 try: with open(filepath, 'r', encoding='utf-8', errors='ignore') as f: lines = f.readlines() for line_num, line in enumerate(lines, 1): for rule_id, rule in self.RULES.items(): if re.search(rule["pattern"], line, re.IGNORECASE): "rule": rule_id, "severity": rule["severity"], "file": str(filepath), "line": line_num, "evidence": line.strip()[:100], "description": rule["description"] }) except Exception:Technical Analysis
The embedded Python scanner is syntactically invalid. After the
if re.search(...)condition, the code contains dictionary entries and a closing})without a corresponding opening dictionary or method call. Theexcept Exception:clause also has no body.Consequently, the supplied scanner cannot execute as valid Python. Even if the syntax were partially corrected, the displayed implementation does not contain a valid
self.findings.append({...})operation, so detected matches would not reliably be added to the report.The broad exception-handling design is also fail-open. If an exception body were added without reporting or propagating the failure, inaccessible, malformed, or unexpectedly encoded files could be omitted while the scanner still appeared to complete. This is particularly unsafe for a tool presented as a pre-installation security control.
The statically flagged
eval(atob...)and network/webhook strings do not themselves constitute malicious behavior. They occur only inside regular ...[truncated 1771 chars]- Remediation
View remediation
Remediation Suggestions
-
Replace the malformed block with a valid finding insertion:
python if re.search(rule["pattern"], line, re.IGNORECASE): self.findings.append({ "rule": rule_id, "severity": rule["severity"], "file": str(filepath), "line": line_num, "evidence": line.strip()[:100], "description": rule["description"], }) -
Implement explicit exception handling that records the affected file and error. Mark the overall scan as incomplete and return a nonzero process status when any file cannot be scanned.
-
Do not silently suppress decoding, permission, parsing, or regular-expression errors. Distinguish expected file-access failures from internal scanner defects.
-
Move the implementation from an untested Markdown example into an actual executable Python script and provide a documented, valid invocation command.
-
Add automated syntax checks and unit tests covering positive and negative fixtures for every advertised rule. Tests must verify that findings are appended, severity aggregation is correct, and file-reading failures cannot produce a clean result.
-
Reconcile the documentation with the implementation. Either implement all 24 advertised rules and configuration options or explicitly disclose the smaller supported rule set.
-
Remove or correct references to absent Node scripts, callback functionality, Base64 decoding, and unsupported command-line options.
-
Keep scanning local and least-privileged. Network access is unnecessary for the declared static-analysis functionality and should not be requested unless a separately documented feature requires it.
-