SB2023112848 - Information disclosure in Samba

Description

This security bulletin contains information about 1 security vulnerability.

1) Improper access control (CVE-ID: CVE-2018-14628)

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to improper access restrictions when Samba is an Active Directory Domain Controller. When a domain was provisioned with an unpatched Samba version, the ntSecurityDescriptor is simply inherited from Domain/Partition-HEAD-Object instead of being very strict (as on a Windows provisioned domain). This means also non privileged users can use the LDAP_SERVER_SHOW_DELETED_OID control in order to view, the names and preserved attributes of deleted objects.

Remediation

Install update from vendor's website.

References

• https://bugzilla.samba.org/show_bug.cgi?id=13595
• https://bugzilla.redhat.com/show_bug.cgi?id=1625445
• https://www.samba.org/samba/security/CVE-2018-14628.html
• https://www.samba.org/samba/history/samba-4.19.3.html