Allele Security Alert
ASA-2019-00230
Identifier(s)
ASA-2019-00230, CVE-2019-3870
Title
World writable files in Samba AD DC private/ dir
Vendor(s)
The Samba Project
Product(s)
Samba
Affected version(s)
Samba 4.8
Fixed version(s)
Samba 4.9.6
Samba 4.10.2
Proof of concept
Unknown
Description
During the creation of a new Samba AD DC, files are created in a the private/ subdirectory of our 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, that is world-writable, including a sample krb5.conf and the list of DNS names and servicePrincipalName values to update.
Technical details
Unknown
Credits
Björn Baumbach
Reference(s)
World writable files in Samba AD DC private/ dir
https://www.samba.org/samba/security/CVE-2019-3870.html
CVE-2019-3870
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3870
CVE-2019-3870
https://nvd.nist.gov/vuln/detail/CVE-2019-3870
If there is any error in this alert or you wish a comprehensive analysis, let us know.
Last modified: April 27, 2019