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Rule Reference

SEC661lintai-ai-securitythreat-reviewsecuritystablehookdeny

Hook script: insecure chmod

Hook script performs an insecure permission change

Public lane
threat-review
Category
security
Provider
lintai-ai-security
Scope
per-file
Surface
hook
Tier
stable
Severity
deny
Confidence
high
Detection
structural
Remediation
message only
How to read this lane

Explicit malicious, secret-bearing, or spyware-like review.

How to read this category

Strong exploit, secret, or unsafe-execution signal.

Activation Model

Preset Activation

These presets explain where this rule appears in the product experience.

threat-reviewsidecar lane

Lifecycle

Stable Lifecycle Contract

State

stable

Graduation rationale

Matches explicit insecure chmod payloads in executable hook lines.

Deterministic signal basis

HookSignals shell-token analysis over non-comment hook lines for `chmod 777`, `chmod 0777`, or symbolic world-writable modes such as `a+rwx`.

Malicious corpus
hook-privilege-escalation-payloads
Benign corpus
cursor-plugin-clean-basic
structured evidence required remediation reviewed
Canonical note

Structural stable rule positioned as an explicit threat-review control: high-signal malicious, credential-bearing, or spyware-like behavior that stays opt-in rather than shaping the quiet default.

Nearby Signals

Related Rules

SEC201Hook script: remote code executionHook script downloads remote code and executes itthreat-reviewsecurityhook
SEC202Hook script: secret exfiltrationHook script appears to exfiltrate secrets through a network callthreat-reviewsecurityhook
SEC203Hook script: insecure HTTP secret sendHook script sends secret material to an insecure http:// endpointthreat-reviewsecurityhook
SEC204Hook script: TLS verification disabledHook script disables TLS or certificate verification for a network callthreat-reviewsecurityhook
SEC205Hook script: hardcoded auth in network callHook script embeds static authentication material in a network callthreat-reviewsecurityhook
SEC206Hook script: base64 payload executionHook script decodes a base64 payload and executes itthreat-reviewsecurityhook

Why It Matters ​

World-writable permission changes like chmod 777 create broad write access and often turn local files or sockets into privilege-escalation footholds.

What Triggers ​

SEC661 matches executable hook lines that run insecure chmod modes such as chmod 777, chmod 0777, or symbolic world-writable modes like a+rwx.

False Positives ​

This can appear in rough local setup scripts, but shared committed hooks should not silently open files to all users.

Remediation ​

Replace broad chmod modes with the minimum required permissions and keep host permission changes out of shared hooks when possible.