Samba CVE-2019-14833 Remote Security Bypass Vulnerability

Description

Samba is prone to a security-bypass vulnerability. Successful exploit may allow attackers to bypass certain security restrictions and gain unauthorized access to resources. Samba versions 4.5.0 and later are vulnerable.

Technologies Affected

• 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 4.10.8
• Samba Samba 4.10.9
• Samba Samba 4.11.0
• Samba Samba 4.11.1
• Samba Samba 4.5.0
• Samba Samba 4.5.1
• Samba Samba 4.5.10
• Samba Samba 4.5.12
• Samba Samba 4.5.13
• Samba Samba 4.5.14
• Samba Samba 4.5.15
• Samba Samba 4.5.16
• Samba Samba 4.5.2
• Samba Samba 4.5.3
• Samba Samba 4.5.4
• Samba Samba 4.5.5
• Samba Samba 4.5.6
• Samba Samba 4.5.7
• Samba Samba 4.6.0
• Samba Samba 4.6.1
• Samba Samba 4.6.11
• Samba Samba 4.6.14
• Samba Samba 4.6.16
• Samba Samba 4.6.4
• Samba Samba 4.6.6
• Samba Samba 4.6.7
• Samba Samba 4.6.8
• Samba Samba 4.7.0
• Samba Samba 4.7.1
• Samba Samba 4.7.12
• Samba Samba 4.7.2
• Samba Samba 4.7.3
• Samba Samba 4.7.4
• Samba Samba 4.7.5
• Samba Samba 4.7.6
• Samba Samba 4.7.7
• Samba Samba 4.7.8
• Samba Samba 4.7.9
• Samba Samba 4.8.0
• Samba Samba 4.8.1
• Samba Samba 4.8.10
• Samba Samba 4.8.11
• Samba Samba 4.8.12
• Samba Samba 4.8.2
• Samba Samba 4.8.3
• Samba Samba 4.8.4
• Samba Samba 4.8.6
• Samba Samba 4.8.7
• Samba Samba 4.8.8
• Samba Samba 4.8.9
• Samba Samba 4.9.0
• Samba Samba 4.9.1
• Samba Samba 4.9.12
• Samba Samba 4.9.13
• 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 18.04 LTS
• Ubuntu Ubuntu Linux 19.04
• Ubuntu Ubuntu Linux 19.10

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.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for suspicious activity such unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from a successful exploit.

Implement multiple redundant layers of security.
Consider using additional tools to further restrict access for the vulnerable applications via access control security policies.

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