A flaw was found in Samba. The security vulnerability occurs when KDC and the kpasswd service share a single account and set of keys, allowing them to decrypt each others tickets. A user who has been requested to change their password, can exploit this flaw to obtain and use tickets to other services.
Weakness
The product requires authentication, but the product has an alternate path or channel that does not require authentication.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | * | 4.14.14 (excluding) |
| Samba | Samba | 4.15.0 (including) | 4.15.9 (excluding) |
| Samba | Samba | 4.16.0 (including) | 4.16.4 (excluding) |
| Samba | Ubuntu | bionic | * |
| Samba | Ubuntu | devel | * |
| Samba | Ubuntu | esm-infra-legacy/trusty | * |
| Samba | Ubuntu | esm-infra/bionic | * |
| Samba | Ubuntu | esm-infra/focal | * |
| Samba | Ubuntu | esm-infra/xenial | * |
| Samba | Ubuntu | focal | * |
| Samba | Ubuntu | impish | * |
| Samba | Ubuntu | jammy | * |
| Samba | Ubuntu | kinetic | * |
| Samba | Ubuntu | lunar | * |
| Samba | Ubuntu | mantic | * |
| Samba | Ubuntu | noble | * |
| Samba | Ubuntu | oracular | * |
| Samba | Ubuntu | plucky | * |
| Samba | Ubuntu | questing | * |
| Samba | Ubuntu | trusty/esm | * |