rage.fail

azure-appsvc-extension-write

derived azure emits CanModifyCode

match (effective permission)

{ "action": [ "Microsoft.Web/sites/extensions/write", "Microsoft.Web/sites/siteextensions/write" ], "scope_type": "resource|resourceGroup|subscription" }

emit

source type	`Identity`
source	`<principal>`
target	`<Microsoft.Web/sites>`
permissions	`Microsoft.Web/sites/extensions/write` `Microsoft.Web/sites/siteextensions/write`
conditions	`service_state`

Narrative

{principal.name} can install a site extension on {target.name} (extensions/write), running attacker code in the worker.

Raw rule rules/derived/azure/appservice.yaml

id: azure-appsvc-extension-write
emits: CanModifyCode
match_effective_permission:
  action:
  - Microsoft.Web/sites/extensions/write
  - Microsoft.Web/sites/siteextensions/write
  scope_type: resource|resourceGroup|subscription
emit:
  source_type: Identity
  source: <principal>
  target: <Microsoft.Web/sites>
  permissions:
  - Microsoft.Web/sites/extensions/write
  - Microsoft.Web/sites/siteextensions/write
  conditions:
  - service_state
  escalation: Install a site/Kudu extension that runs in the app worker process.
  false_positive_note: Extension loads in the worker; if the app is stopped, CONDITIONAL(service_state)
    + CanStart.
  narrative: '{principal.name} can install a site extension on {target.name} (extensions/write), running
    attacker code in the worker.'