A flaw was found in the Samba AD LDAP server. The AD DC database audit logging module can access LDAP message values freed by a preceding database module, resulting in a use-after-free issue. This issue is only possible when modifying certain privileged attributes, such as userAccountControl.
Weakness
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Samba | Samba | 4.3.0 (including) | 4.14.14 (excluding) |
| Samba | Samba | 4.15.0 (including) | 4.15.9 (excluding) |
| Samba | Samba | 4.16.0 (including) | 4.16.4 (excluding) |
| Red Hat Enterprise Linux 8 | RedHat | libldb-0:2.5.2-2.el8 | * |
| Red Hat Enterprise Linux 9 | RedHat | libldb-0:2.5.2-1.el9 | * |
| Ldb | Ubuntu | bionic | * |
| Ldb | Ubuntu | esm-infra/bionic | * |
| Ldb | Ubuntu | esm-infra/focal | * |
| Ldb | Ubuntu | focal | * |
| Ldb | Ubuntu | impish | * |
| Ldb | Ubuntu | jammy | * |
| Ldb | Ubuntu | trusty/esm | * |
| Samba | Ubuntu | bionic | * |
| Samba | Ubuntu | devel | * |
| Samba | Ubuntu | esm-infra/bionic | * |
| Samba | Ubuntu | esm-infra/focal | * |
| 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 | * |