Privilege escalation in Open Ticket Request System

1) Privilege escalation

EUVDB-ID: #VU9423

Risk: High

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Amber]

CVE-ID: CVE-2017-16664

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

The vulnerability allows a remote authenticated attacker to gain elevated privileges on the target system.

The weakness exists due to insufficient security checks in the recovery procedure. A remote attacker who is logged into OTRS as an agent can request special URLs from OTRS and execute arbitrary shell commands with the permissions of the web server user.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update to version 3.3.20, 4.0.26 or 5.0.24.

Vulnerable software versions

OTRS: 3.3.0 - 5.0.23

CPE2.3

• cpe:2.3:a:otrs_org:open_ticket_request_system:3.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:otrs_org:open_ticket_request_system:3.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:otrs_org:open_ticket_request_system:3.3.2:*:*:*:*:*:*:*

External links

https://www.otrs.com/security-advisory-2017-07-security-update-otrs-framework/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.