services / Google Cloud / Compute Engine managed instances

Create and alter managed instances.

Allows access to general core VM infrastructure, which can support a broad array of organizational functions. Note that the terms "instance" and "VM" are interchangeable within the compute engine documentation, although may have semantic differences within these privileges.

compute.​instances.​getSerialPortOutput

Allows reading data from an instance even if exfiltration is otherwise prevented via firewall rules / limited console access. Requires an additional exploit to write data to the serial port.

Risks

1. Data exfiltration (CRITICAL)

Scope: HIGH

This privilege may grant access to sensitive data from a single organizational function, or allow interruption of a service supporting a single organizational function.

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