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.

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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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