TI-2019-02880 Aliases CVE-2019-3870 GHSA-xv9q-3jh5-9rrc

Incorrect default permissions in samba

LOW 28CWE-276Published 2019-04-09 · Updated 2024-08-04

Key facts

Attack vector: Local
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · Low · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00552 46th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
The Samba Project	samba	4.9.6; 4.10.2	—	No fix listed	CNA

samba VendorThe Samba Project Affected 4.9.6; 4.10.2 Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPE	Versions	Role	Vendor
cpe:2.3:a:samba:samba::::::::	4.9.0 to before 4.9.6; 4.10.0 to before 4.10.2	Vulnerable	Samba
cpe:2.3:o:fedoraproject:fedora:29:::::::*	29	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:30:::::::*	30	Vulnerable	Fedoraproject
cpe:2.3:a:synology:directory_server:-:::::::*	not specified by NVD	Vulnerable	Synology
cpe:2.3:a:synology:router_manager:1.2:::::::*	1.2	Vulnerable	Synology
cpe:2.3:o:synology:diskstation_manager:5.2:::::::*	5.2	Vulnerable	Synology
cpe:2.3:o:synology:diskstation_manager:6.1:::::::*	6.1	Vulnerable	Synology
cpe:2.3:o:synology:diskstation_manager:6.2:::::::*	6.2	Vulnerable	Synology
cpe:2.3:o:synology:skynas_firmware:-:::::::*	not specified by NVD	Vulnerable	Synology
cpe:2.3:h:synology:skynas:-:::::::*	not specified by NVD	Running on	Synology

cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.9.0 to before 4.9.6; 4.10.0 to before 4.10.2 Vulnerable ·Samba
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:* Versions 29 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
cpe:2.3:a:synology:directory_server:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Synology
cpe:2.3:a:synology:router_manager:1.2:*:*:*:*:*:*:* Versions 1.2 Vulnerable ·Synology
cpe:2.3:o:synology:diskstation_manager:5.2:*:*:*:*:*:*:* Versions 5.2 Vulnerable ·Synology
cpe:2.3:o:synology:diskstation_manager:6.1:*:*:*:*:*:*:* Versions 6.1 Vulnerable ·Synology
cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:* Versions 6.2 Vulnerable ·Synology
cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Synology
cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Synology

Show 2 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:o:synology:vs960hd_firmware::::::::	before 2.3.6-1720	Vulnerable	Synology
cpe:2.3:h:synology:vs960hd:-:::::::*	not specified by NVD	Running on	Synology

cpe:2.3:o:synology:vs960hd_firmware:*:*:*:*:*:*:*:* Versions before 2.3.6-1720 Vulnerable ·Synology
cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Synology

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Advisory · 2019-04-09
The Samba Project samba — FEDORA-2019-db21b5f1d2
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2019-02890 Path traversal in sambaPriority LOW 30
Show all 2 records → Advisory →
Advisory · 2019-04-09
The Samba Project samba — FEDORA-2019-cacf88eabf
2 records Highest priority Priority LOW 2 LOW
Other records, highest priority first
- TI-2019-02890 Path traversal in sambaPriority LOW 30
Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Not affected: 6 products

Red Hat Enterprise Linux 5
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Storage 3
Red Hat Virtualization 4

Timeline

2026-10-02 Threatist record created from CVE-2019-3870
2026-10-03 Alias added: GHSA-xv9q-3jh5-9rrc

References

Exploit 1

https://bugzilla.samba.org/show_bug.cgi?id=13834

Patch 1

https://www.samba.org/samba/security/CVE-2019-3870.html

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences