Denial of service in Fortinet FortiAnalyzer

Published: 2020-06-23
Risk Medium
Patch available YES
Number of vulnerabilities 1
Exploitation vector Network
Public exploit N/A
Vulnerable software
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor Fortinet, Inc

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Insufficient Control of Network Message Volume

EUVDB-ID: #VU29202

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]


CWE-ID: CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)

Exploit availability: No


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an insufficient control of network message volume. A remote attacker can send specially crafted mode 6 queries to the FortiAnalyzer built-in NTP server, perform NTP amplification attacks and cause a denial of service condition on the target system. 

Note: This vulnerability affects only models that support FortiRecorder management:

  • FAZ_200F
  • FAZ_300F
  • FAZ_400E
  • FAZ_800F.
  • FAZ_1000E
  • FAZ_1000F
  • FAZ_2000E
  • FAZ_3000F
  • FAZ_3500G
  • FAZ_3700F
  • FAZ_VM64
  • FAZ_VM64_KVM


Install updates from vendor's website.

Vulnerable software versions

FortiAnalyzer: 5.0.0 - 5.0.13, 5.2.0 - 5.2.10, 5.4.0 - 5.4.5, 5.6.0 - 5.6.5, 6.0.0 - 6.0.1, 6.2.0 - 6.2.3, 6.4.0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.