CVE-2023-4154
Published: 10 October 2023
A design flaw was found in Samba's DirSync control implementation, which exposes passwords and secrets in Active Directory to privileged users and Read-Only Domain Controllers (RODCs). This flaw allows RODCs and users possessing the GET_CHANGES right to access all attributes, including sensitive secrets and passwords. Even in a default setup, RODC DC accounts, which should only replicate some passwords, can gain access to all domain secrets, including the vital krbtgt, effectively eliminating the RODC / DC distinction. Furthermore, the vulnerability fails to account for error conditions (fail open), like out-of-memory situations, potentially granting access to secret attributes, even under low-privileged attacker influence.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
samba Launchpad, Ubuntu, Debian |
trusty |
Needs triage
|
| xenial |
Needs triage
|
|
| bionic |
Needs triage
|
|
| upstream |
Needs triage
|
|
| focal |
Released
(2:4.15.13+dfsg-0ubuntu0.20.04.6)
|
|
| jammy |
Released
(2:4.15.13+dfsg-0ubuntu1.5)
|
|
| lunar |
Released
(2:4.17.7+dfsg-1ubuntu2.3)
|
|
| mantic |
Released
(2:4.18.6+dfsg-1ubuntu2.1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |