Man-in-the-middle Attack Vulnerability in Fortinet FortiClient Products
CVE-2021-41028

8.2HIGH

Key Information:

Vendor

Fortinet
Status
Fortinet Forticlientems, Forticlientwindows, Forticlientlinux, Forticlientmac
Vendor
CVE Published:
16 December 2021

What is CVE-2021-41028?

The vulnerability arises from the use of hard-coded cryptographic keys in versions of FortiClientEMS and improper certificate validation in FortiClient for Windows, Linux, and Mac. This flawed implementation enables an unauthenticated and network-adjacent attacker to potentially execute a man-in-the-middle attack through the telemetry protocol, compromising secure communication between the EMS and FortiClient.

Affected Version(s)

Fortinet FortiClientEMS, FortiClientWindows, FortiClientLinux, FortiClientMac FortiClientEMS 7.0.1 and below, 6.4.6 and below, FortiClientWindows, FortiClientLinux, FortiClientMac 7.0.1 and below, 6.4.6 and below.

References

https://fortiguard.com/advisory/FG-IR-21-075
x_refsource_CONFIRM

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Adjacent Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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CVE-2021-41028 : Man-in-the-middle Attack Vulnerability in Fortinet FortiClient Products