Impact: Moderate Public Date: 2019-04-09 CWE: CWE-125 Bugzilla: 1689010: CVE-2019-3870 samba: World writable files in Samba AD DC private/ dir A vulnerability was found in Samba versions 4.9 and later. During the creation of a new Samba AD DC, files are created in a private subdirectory of the install location. This directory is typically mode 0700, that is owner (root) only access. However in some upgraded installations it will have other permissions, such as 0755, because this was the default before Samba 4.8. Within this directory, files are created with mode 0666, which is world-writable, including a sample krb5.conf, and the list of DNS names and servicePrincipalName values to update.
Find out more about CVE-2019-3870 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue did not affect the versions of samba as shipped with Red Hat Enterprise Linux or Red Hat Gluster Storage 3 as they did not include support for Active Directory Domain Controller.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 6.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H |
| Attack Vector | Local |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | Low |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Virtualization 4 | redhat-virtualization-host | Not affected |
| Red Hat Gluster Storage 3 | samba | Not affected |
| Red Hat Enterprise Linux 7 | samba | Not affected |
| Red Hat Enterprise Linux 6 | samba | Not affected |
| Red Hat Enterprise Linux 5 | samba | Not affected |
Vulmon