XXE attack in GE Cimplicity

1) XXE attack

EUVDB-ID: #VU16329

Risk: Low

CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-15362

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

The vulnerability allows a remote attacker to conduct XXE-attack on the target system.

The vulnerability exists due to improper handling of XML External Entities (XXEs) when parsing an XML file. A remote attacker can trick the victim into open an XML file that submits malicious input, trigger path traversal inside the Proficy server to initiate an OPC UA session and retrieve an arbitrary file from the targeted system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

CIMPLICITY: 9.0 R2 - 10.0

External links

http://digitalsupport.ge.com/communities/en_US/Article/GE-Digital-Security-Advisory-GED-18-01

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?

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