Permissions, Privileges, and Access Controls in Fortinet, FortiOS

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU40524

Risk: High

CVSSv3.1: 9.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C]

CVE-ID: CVE-2016-1909

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Fortinet FortiAnalyzer before 5.0.12 and 5.2.x before 5.2.5; FortiSwitch 3.3.x before 3.3.3; FortiCache 3.0.x before 3.0.8; and FortiOS 4.1.x before 4.1.11, 4.2.x before 4.2.16, 4.3.x before 4.3.17 and 5.0.x before 5.0.8 have a hardcoded passphrase for the Fortimanager_Access account, which allows remote attackers to obtain administrative access via an SSH session.

Mitigation

Install update from vendor's website.

Vulnerable software versions

FortiOS: 5.0 - 5.0.7

External links

http://blog.fortinet.com/post/brief-statement-regarding-issues-found-with-fortios
http://packetstormsecurity.com/files/135225/FortiGate-OS-5.0.7-SSH-Backdoor.html
http://seclists.org/fulldisclosure/2016/Jan/26
http://www.fortiguard.com/advisory/multiple-products-ssh-undocumented-login-vulnerability
http://www.securitytracker.com/id/1034663
http://twitter.com/esizkur/status/686842135501508608
http://www.exploit-db.com/exploits/39224/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.