Fortinet Forticlient security update

Number: AV17-193
Date: 14 December 2017

Purpose

The purpose of this advisory is to bring attention to an update for Fortinet’s FortiClient endpoint protection.

Assessment

CCIRC is aware of a critical information disclosure vulnerability VulnerabilityA flaw or weakness in the design or implementation of an information system or its environment that could be exploited to adversely affect an organization's assets or operations. in Fortinet’s FortiClient.  Exploitation of this vulnerability may allow for unwanted disclosure of VPN VPNSee virtual private network. authentication AuthenticationA process or measure used to verify a users identity. credentials, allowing a regular user to harvest other user’s encrypted credentials and decrypt them into plaintext PlaintextUnencrypted information. using a hard coded key.

Affected Versions:

• FortiClient for Windows: 5.6.0 and versions below
• FortiClient for Mac OSX 5.6.0 and versions below
• FortiClient SSLVPN Client for Linux 4.4.2334 and versions below

CVE reference: CVE-2017-14184

Suggested Action

CCIRC recommends that system administrators test and deploy the vendor-released updates to affected applications accordingly.

• FortiClient for Windows: Upgrade to 5.6.1
• FortiClient for Mac OSX: Upgrade to 5.6.1
• FortiClient SSLVPN Client for Linux: Upgrade to 4.4.2335 released together with FortiOS 5.4.7

References:

• https://fortiguard.com/psirt/FG-IR-17-214
• http://seclists.org/fulldisclosure/2017/Dec/43
• https://www.sec-consult.com/en/blog/advisories/vpn-credentials-disclosure-in-fortinet-forticlient/index.html  
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=2017-14184