Fortinet FortiOS CVE-2019-15705 Denial of Service Vulnerability

Description

Fortinet FortiOS is prone to a denial-of-service vulnerability. Attackers can exploit this issue to cause denial-of-service conditions.

Technologies Affected

• Fortinet FortiOS 4.3.10
• Fortinet FortiOS 4.3.12
• Fortinet FortiOS 4.3.13
• Fortinet FortiOS 4.3.14
• Fortinet FortiOS 4.3.8
• Fortinet FortiOS 5.0.1
• Fortinet FortiOS 5.0.2
• Fortinet FortiOS 5.0.3
• Fortinet FortiOS 5.0.5
• Fortinet FortiOS 5.4.5
• Fortinet Fortios 4.1.10
• Fortinet Fortios 4.1.11
• Fortinet Fortios 4.2.12
• Fortinet Fortios 4.2.13
• Fortinet Fortios 4.3.0
• Fortinet Fortios 4.3.15
• Fortinet Fortios 4.3.16
• Fortinet Fortios 4.3.17
• Fortinet Fortios 4.3.18
• Fortinet Fortios 4.3.19
• Fortinet Fortios 4.3.9
• Fortinet Fortios 5.0.0
• Fortinet Fortios 5.0.10
• Fortinet Fortios 5.0.11
• Fortinet Fortios 5.0.12
• Fortinet Fortios 5.0.13
• Fortinet Fortios 5.0.4
• Fortinet Fortios 5.0.6
• Fortinet Fortios 5.0.7
• Fortinet Fortios 5.0.7
• Fortinet Fortios 5.0.8
• Fortinet Fortios 5.0.9
• Fortinet Fortios 5.2
• Fortinet Fortios 5.2.1
• Fortinet Fortios 5.2.10
• Fortinet Fortios 5.2.11
• Fortinet Fortios 5.2.12
• Fortinet Fortios 5.2.13
• Fortinet Fortios 5.2.14
• Fortinet Fortios 5.2.2
• Fortinet Fortios 5.2.3
• Fortinet Fortios 5.2.4
• Fortinet Fortios 5.2.5
• Fortinet Fortios 5.2.6
• Fortinet Fortios 5.2.7
• Fortinet Fortios 5.2.8
• Fortinet Fortios 5.2.9
• Fortinet Fortios 5.4
• Fortinet Fortios 5.4.0
• Fortinet Fortios 5.4.1
• Fortinet Fortios 5.4.10
• Fortinet Fortios 5.4.11
• Fortinet Fortios 5.4.12
• Fortinet Fortios 5.4.2
• Fortinet Fortios 5.4.3
• Fortinet Fortios 5.4.4
• Fortinet Fortios 5.4.6
• Fortinet Fortios 5.4.7
• Fortinet Fortios 5.4.8
• Fortinet Fortios 5.4.9
• Fortinet Fortios 5.6.0
• Fortinet Fortios 5.6.1
• Fortinet Fortios 5.6.10
• Fortinet Fortios 5.6.11
• Fortinet Fortios 5.6.2
• Fortinet Fortios 5.6.3
• Fortinet Fortios 5.6.4
• Fortinet Fortios 5.6.5
• Fortinet Fortios 5.6.6
• Fortinet Fortios 5.6.7
• Fortinet Fortios 5.6.8
• Fortinet Fortios 5.6.9
• Fortinet Fortios 6.0.0
• Fortinet Fortios 6.0.1
• Fortinet Fortios 6.0.2
• Fortinet Fortios 6.0.3
• Fortinet Fortios 6.0.4
• Fortinet Fortios 6.0.5
• Fortinet Fortios 6.0.6
• Fortinet Fortios 6.2.0
• Fortinet Fortios 6.2.1

Recommendations

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

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor the network for suspicious requests. This may help detect attacks that try to exploit these and similar vulnerabilities. Audit all applicable logs regularly.

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