Medium severity6.1NVD Advisory· Published Apr 9, 2019· Updated Jun 17, 2026
CVE-2019-3870
CVE-2019-3870
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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Affected products
14cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*range: >=4.9.0,<4.9.6
- (no CPE)range: 4.9 - <4.9.6, <4.10.2
- cpe:2.3:a:synology:directory_server:-:*:*:*:*:*:*:*
- cpe:2.3:a:synology:router_manager:1.2:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
cpe:2.3:o:synology:diskstation_manager:5.2:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:synology:diskstation_manager:5.2:*:*:*:*:*:*:*
- cpe:2.3:o:synology:diskstation_manager:6.1:*:*:*:*:*:*:*
- cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*
- cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*
- Range: 4.9 - <4.9.6, <4.10.2
- osv-coordsRange: < 4.14.6+git.182.2205d5224e3-1.1
- The Samba Project/sambav5Range: 4.9.6
Patches
Vulnerability mechanics
References
7- www.samba.org/samba/security/CVE-2019-3870.htmlnvdMitigationPatchVendor Advisory
- bugzilla.samba.org/show_bug.cginvdExploitIssue TrackingPatchVendor Advisory
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
- support.f5.com/csp/article/K20804356nvdThird Party Advisory
- www.synology.com/security/advisory/Synology_SA_19_15nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6354GALK73CZWQKFUG7AWB6EIEGFMF62/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JTJVFA3RZ6G2IZDTVKLHRMX6QBYA4GPA/nvd
News mentions
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