cifs-utils through 6.14, with verbose logging, can cause an information leak when a file contains = (equal sign) characters but is not a valid credentials file.
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 |
|---|---|---|---|
| Cifs-utils | Samba | * | 6.15 (excluding) |
| Cifs-utils | Ubuntu | bionic | * |
| Cifs-utils | Ubuntu | esm-infra-legacy/trusty | * |
| Cifs-utils | Ubuntu | esm-infra/xenial | * |
| Cifs-utils | Ubuntu | focal | * |
| Cifs-utils | Ubuntu | impish | * |
| Cifs-utils | Ubuntu | jammy | * |
| Cifs-utils | Ubuntu | trusty/esm | * |
| Cifs-utils | 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: