Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2019-3870

Disclosure Date: April 09, 2019 •
CVE-2019-3870 CVSS v3 Base Score: 6.1
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

A vulnerability was found in Samba from version (including) 4.9 to versions before 4.9.6 and 4.10.2. 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.

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CVSS V3 Severity and Metrics
Base Score:
6.1 Medium
Impact Score:
4.2
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
Low
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
samba 4.9.6
samba 4.10.2
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • fedoraproject,
  • samba,
  • synology

Products

  • directory server -,
  • diskstation manager 5.2,
  • diskstation manager 6.1,
  • diskstation manager 6.2,
  • fedora 29,
  • fedora 30,
  • router manager 1.2,
  • samba,
  • skynas firmware -,
  • vs960hd firmware
Technical Analysis