lintai docs

Appearance

Rule Reference

SEC658lintai-ai-securitystablejsonwarn

Plugin hook: cron persistence

Plugin hook command manipulates cron persistence

Provider
lintai-ai-security
Surface
json
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
mcpmembership

Lifecycle

Stable Lifecycle Contract

State

stable_gated

Graduation rationale

Checks committed plugin hook command values for explicit cron persistence setup.

Deterministic signal basis

JsonSignals command-string analysis over ArtifactKind::CursorPluginHooks for `crontab` mutation or writes to cron persistence paths.

Malicious corpus
plugin-hook-command-service-persistence
Benign corpus
plugin-hook-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

SEC301MCP config: shell trampolineMCP configuration shells out through sh -c or bash -cjsonstable
SEC302Config: insecure HTTP endpointConfiguration contains an insecure http:// endpointjsonstable
SEC303MCP config: credential env passthroughMCP configuration passes through credential environment variablesjsonstable
SEC304Config: TLS verification disabledConfiguration disables TLS or certificate verificationjsonstable
SEC305Config: hardcoded auth materialConfiguration embeds static authentication material in a connection or auth valuejsonstable
SEC309Config: literal secrets in configConfiguration commits literal secret material in env, auth, or header valuesjsonstable

Why It Matters ​

Plugin hooks run automatically in installed tooling. Cron mutation from those hooks creates recurring persistence on the host.

What Triggers ​

SEC658 matches plugin hook command strings that mutate cron through crontab or write cron persistence files such as /etc/crontab, /etc/cron*, or /var/spool/cron.

False Positives ​

Provisioning-style plugins may do this intentionally, but it should remain explicit and reviewed.

Remediation ​

Remove cron persistence from the plugin hook and keep scheduled-task installation out of ordinary shared plugins.