A use-after-free flaw was found in the way samba AD DC LDAP servers, handled Paged Results control is combined with the ASQ control. A malicious user in a samba AD could use this flaw to cause denial of service. This issue affects all samba versions before 4.10.15, before 4.11.8 and before 4.12.2.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 4.10.0 (including) | 4.10.15 (excluding) |
| Samba | Samba | 4.11.0 (including) | 4.11.8 (excluding) |
| Samba | Samba | 4.12.0 (including) | 4.12.2 (excluding) |
| Samba | Ubuntu | devel | * |
| Samba | Ubuntu | eoan | * |
| Samba | Ubuntu | esm-infra/focal | * |
| Samba | Ubuntu | focal | * |
| Samba | Ubuntu | trusty | * |
| Samba | Ubuntu | upstream | * |