Sensitive data could be exposed in world readable logs of cloud-init before version 22.3 when schema failures are reported. This leak could include hashed passwords.
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Cloud-init | Canonical | * | 22.3 (excluding) |
| Cloud-init | Ubuntu | bionic | * |
| Cloud-init | Ubuntu | devel | * |
| Cloud-init | Ubuntu | focal | * |
| Cloud-init | Ubuntu | impish | * |
| Cloud-init | Ubuntu | jammy | * |
| Cloud-init | Ubuntu | kinetic | * |
| Cloud-init | Ubuntu | upstream | * |
While logging all information may be helpful during development stages, it is important that logging levels be set appropriately before a product ships so that sensitive user data and system information are not accidentally exposed to potential attackers. Different log files may be produced and stored for: