SB20230411102 - Multiple vulnerabilities in Fortinet FortiClient for Windows

Description

This security bulletin contains information about 3 vulnerabilities.

1) Incorrect authorization (CVE-ID: CVE-2022-40682)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to incorrect authorization. A local user can impersonate FortiClient process and create arbitrary files on the system.

2) Incorrect permission assignment for critical resource (CVE-ID: CVE-2022-43946)

CWE-ID: CWE-732 - Incorrect Permission Assignment for Critical Resource

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to incorrect permission assignment to a windows pipe in FortiClient Logging daemon. A remote attacker on the same file sharing network can write arbitrary data to a windows pipe and execute arbitrary code on the system.

3) External Control of File Name or Path (CVE-ID: CVE-2022-42470)

CWE-ID: CWE-73 - External Control of File Name or Path

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to create arbitrary files on the system.

The vulnerability exists due to application allows an attacker to control path of the files to create. A local user can create arbitrary files on the system with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://fortiguard.com/psirt/FG-IR-22-336
• https://fortiguard.com/psirt/FG-IR-22-429
• https://www.zerodayinitiative.com/advisories/ZDI-23-1104/
• https://fortiguard.com/psirt/FG-IR-22-320