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Security audit

MochiLab 随手记与待办 · Quick Notes and Tasks

Security checks for vulnerabilities and agentic risk

Overview

This skill manages notes and tasks within the current workspace, with disclosed local storage and no evidence of credential theft or unrelated actions.

Notes and operation history are stored as unencrypted workspace files, so consider workspace access and backups before saving sensitive information. Archiving retains records, and due dates do not create reminders.

A.I.G

Vulnerability Patterns
  • 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
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Credential Access

High
Category
Privilege Escalation
Confidence
70% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · tests/spec.mjs (reported line 25)May include surrounding context.

js
t d=path.join(w,'.mochilab',slug);fs.mkdirSync(d,{recursive:true});fs.writeFileSync(path.join(d,'write.lock'),'active');assert.throws(()=>call(w,{action:'list'}),/busy/);assert.equal(fs.readFileSync(path.join(d,'write.lock'),'utf8'),'active');});
test('a failed operation preserves the previous state',()=>{const w=fresh();transact(w,slug,{requestId:'good'},(i,s)=>{s.records.push('saved');return {changed:true,result:{done:true}};});const file=path.join(w,'.mochilab',slug,'state.json'),before=fs.readFileSync(file,'utf8');assert.throws(()=>transact(w,slug,{requestId:'bad'},(i,s)=>{s.records.push('unsaved');throw new Error('failed');}));assert.equal(fs.readFileSync(file,'utf8'),before);});
test('linked paths are rejected when supported by the host',t=>{const w=fresh(),outside=fresh();try{fs.symlinkSync(outside,path.join(w,'linked'),process.platform==='win32'?'junction':'dir');}catch{t.skip('Host does not allow symlink creation');return;}assert.throws(()=>safePath(w,'linked/secret.txt'));});

Scope Creep

Low
Category
Excessive Agency
Confidence
70% confidence
Finding

Skill's behavior or capabilities extend beyond its stated purpose. Scope creep allows an agent to perform actions unrelated to its documented functionality, increasing the attack surface.

Content

Scanner excerpt · LICENSE (reported line 7)May include surrounding context.

text
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Static analysis

No suspicious patterns detected.