Remote code execution in GE Proficy CIMPLICITY HMI

1) Improper access control

EUVDB-ID: #VU6189

Risk: Critical

CVSSv3.1: 8.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2014-0751

CWE-ID: CWE-284 - Improper Access Control

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to improper access control and incorrect validation of the szScreen field when processing file uploads within the CimWebServer component. A remote unauthenticated attacker can upload and execute arbitrary file on the target system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Note: this vulnerability has been exploited in targeted attacks.

Mitigation

The vulnerability is present in Proficy HMI/SCADA – CIMPLICITY: Version 4.01 and greater.

To resolve the issue, install Proficy HMI/SCADA – CIMPLICITY 8.2 SIM 24:
http://support.ge-ip.com/support/index?page=dwchannel&id=DN4128

Vulnerable software versions

CIMPLICITY: 8.2 SIM 23

External links

http://ge-ip.force.com/communities/servlet/fileField?retURL=%2Fcommunities%2Fapex%2FKnowledgeDetail...
http://ge-ip.force.com/communities/servlet/fileField?retURL=%2Fcommunities%2Fapex%2FKnowledgeDetail...
http://www.zerodayinitiative.com/advisories/ZDI-14-016/
http://ics-cert.us-cert.gov/alerts/ICS-ALERT-14-281-01B

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.