#VU29202 Insufficient Control of Network Message Volume

Published: 2020-06-23

Vulnerability identifier: #VU29202

Vulnerability 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]



Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Fortinet, Inc


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


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.

Is there known malware, which exploits this vulnerability?

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

Latest bulletins with this vulnerability