Insecure DLL loading in Fortinet FortiClient

Published: 2019-05-16 15:22:37 | Updated: 2019-05-16
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-5589
CVSSv3 6.5 [CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CWE ID CWE-427
Exploitation vector Network
Public exploit N/A
Vulnerable software Fortinet FortiClient
Vulnerable software versions Fortinet FortiClient 6.0.5
Fortinet FortiClient 6.0.4
Fortinet FortiClient 6.0.3

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Vendor URL Fortinet, Inc

Security Advisory

1) Insecure DLL loading

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to the application loads DLL libraries in an insecure manner during installation, when FortiClientOnlineInstaller.exe is executed. A remote attacker can place a specially crafted .dll file on a remote SMB fileshare, trick the victim into executing the FortiClientOnlineInstaller.exe file from the share and execute arbitrary code on victim's system.

Remediation

Install updates from vendor's website.

External links

https://fortiguard.com/psirt/FG-IR-19-060

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