Samba CVE-2019-10197 Privilege Escalation Vulnerability

Description

Samba is prone to a privilege-escalation vulnerability. An attacker can exploit this issue to gain elevated privileges. This issue has been fixed in Samba 4.9.13, 4.10.8 and 4.11.0rc3.

Technologies Affected

• IBM Watson Studio Local 1.2.3
• Redhat Enterprise Linux 7
• Redhat Enterprise Linux 8
• Redhat Gluster Storage Server for On-premise 3 for RHEL 6
• Redhat Gluster Storage Server for On-premise 3 for RHEL 7
• Samba Samba 4.10
• Samba Samba 4.10.1
• Samba Samba 4.10.2
• Samba Samba 4.10.3
• Samba Samba 4.10.4
• Samba Samba 4.10.5
• Samba Samba 4.10.7
• Samba Samba 4.11.0
• Samba Samba 4.9.0
• Samba Samba 4.9.1
• Samba Samba 4.9.12
• Samba Samba 4.9.2
• Samba Samba 4.9.3
• Samba Samba 4.9.4
• Samba Samba 4.9.5
• Samba Samba 4.9.6
• Samba Samba 4.9.7
• Samba Samba 4.9.8
• Samba Samba 4.9.9
• Ubuntu Ubuntu Linux 19.04

Recommendations

Block external access at the network boundary, unless external parties require service.
Filter access to the affected computer at the network boundary if global access isn’t needed. Restricting access to only trusted computers and networks might greatly reduce the likelihood of a successful exploit.

Run all software as a nonprivileged user with minimal access rights.
Attackers may successfully exploit client flaws in the browser through cross-site scripting vulnerabilities. When possible, run all software as a user with minimal privileges and limited access to system resources. Use additional precautions such as restrictive environments to insulate software that may potentially handle malicious content.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to detect and block attacks and anomalous activity such as requests containing suspicious URI sequences. Since the webserver may log such requests, review its logs regularly.

Updates are available. Please see the references or vendor advisory for more information.