Fortinet fixed a critical remote code execution bug in FortiClientLinux

Fortinet addressed multiple issues in FortiOS and other products, including a critical remote code execution flaw in FortiClientLinux.

Fortinet fixed a dozen vulnerabilities in multiple products, including a critical-severity remote code execution (RCE) issue, tracked as CVE-2023-45590 (CVSS score of 9.4), in FortiClientLinux.

The vulnerability is an Improper Control of Generation of Code (‘Code Injection’) issue that resides in FortiClientLinux. An unauthenticated attacker can trigger the flaw to execute arbitrary code by tricking a FortiClientLinux user into visiting a specially crafted website.

“An Improper Control of Generation of Code (‘Code Injection’) vulnerability [CWE-94] in FortiClientLinux may allow an unauthenticated attacker to execute arbitrary code via tricking a FortiClientLinux user into visiting a malicious website.” reads the advisory published by Fortinet.

Below are the impacted versions and the one released by the company to fix the issue.

Version	Affected	Solution
FortiClientLinux 7.2	7.2.0	Upgrade to 7.2.1 or above
FortiClientLinux 7.0	7.0.6 through 7.0.10	Upgrade to 7.0.11 or above
FortiClientLinux 7.0	7.0.3 through 7.0.4	Upgrade to 7.0.11 or above

The vulnerability was reported to Fortinet by the security researcher CataLpa from Dbappsecurity.

Fortinet did not reveal if this vulnerability is actively exploited in attacks in the wild.

US CISA published an alert to warn Fortinet users of the security updates released by the vendor to address multiple vulnerabilities in its products, including OS and FortiProxy.

“Fortinet released security updates to address vulnerabilities in multiple products, including OS and FortiProxy. A cyber threat actor could exploit some of these vulnerabilities to take control of an affected system.” reads the alert that encourages users and administrators to review the following advisories and apply necessary updates: