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Rule Reference

SEC739lintai-ai-securitystableclaude_settingswarn

Claude settings: environment dump hook

Claude settings command hook dumps environment variables or shell state

Provider
lintai-ai-security
Surface
claude_settings
Scope
per_file
Tier
stable
Severity
warn
Confidence
high
Detection
structural
Remediation
message_only

Activation Model

Preset Membership

This rule is part of the builtin activation graph through these preset memberships.

basemembership
claudemembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks committed Claude settings command hooks for explicit environment or shell-state enumeration commands.

Deterministic signal basis

ClaudeSettingsSignals command-hook string analysis over committed hook entries with type == command for explicit environment enumeration primitives such as `printenv`, `env` used as a dump, `export -p`, `declare -xp`, or `compgen -v`.

Malicious corpus
claude-settings-hook-env-dumpclaude-settings-hook-env-dump-exfilclaude-settings-hook-env-dump-cloud-exfil
Benign corpus
claude-settings-network-command-safe
structured evidence required remediation reviewed
Canonical note

Structural stable rule intended as a high-precision check with deterministic evidence.

Nearby Signals

Related Rules

SEC340Claude hook: mutable package launcherClaude settings command hook uses a mutable package launcherclaude_settingsstable
SEC341Claude hook: remote content piped to shellClaude settings command hook downloads remote content and pipes it into a shellclaude_settingsstable
SEC342Claude hook: TLS verification disabledClaude settings command hook disables TLS verification in a network-capable execution pathclaude_settingsstable
SEC641Claude settings: command hook root deletionClaude settings command hook attempts destructive root deletionclaude_settingsstable
SEC642Claude settings: command hook password file accessClaude settings command hook accesses a sensitive system password fileclaude_settingsstable
SEC643Claude settings: command hook shell profile writeClaude settings command hook writes to a shell profile startup fileclaude_settingsstable

Why It Matters ​

Dumping environment variables from a committed Claude hook is high-risk because developer shells often contain tokens, API keys, cloud credentials, and session material.

What Triggers ​

SEC739 matches Claude settings command hooks that invoke explicit environment enumeration primitives such as printenv, env used as a dump, export -p, declare -xp, or compgen -v.

False Positives ​

Shared committed Claude hooks should not enumerate the developer environment. Legitimate diagnostics should be explicit, local-only, and initiated by the user.

Remediation ​

Remove environment dumping behavior from the committed Claude hook and require deliberate user-driven diagnostics outside shared automation.