CVE-2017-12069

30.08.2017, 19:29

An XXE vulnerability has been identified in OPC Foundation UA .NET Sample Code before 2017-03-21 and Local Discovery Server (LDS) before 1.03.367. Among the affected products are Siemens SIMATIC PCS7 (All versions V8.1 and earlier), SIMATIC WinCC (All versions < V7.4 SP1), SIMATIC WinCC Runtime Professional (All versions < V14 SP1), SIMATIC NET PC Software, and SIMATIC IT Production Suite. By sending specially crafted packets to the OPC Discovery Server at port 4840/tcp, an attacker might cause the system to access various resources chosen by the attacker.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	8.2 HIGH	NETWORK	LOW	NONE	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
mitre	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 75%

Vendor	Product	Version
siemens	simatic_pcs7	𝑥 ≤ 8.1
siemens	wincc	𝑥 ≤ 7.4
ocpfoundation	local_discovery_server	𝑥 ≤ 1.01.333.0
ocpfoundation	ua_.net	𝑥 ≤ 2017-03-21

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-611 - Improper Restriction of XML External Entity Reference
The software processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

References

http://www.securityfocus.com/bid/100559

http://www.securitytracker.com/id/1039510

https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2017-12069.pdf

https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-535640.pdf

http://www.securityfocus.com/bid/100559

http://www.securitytracker.com/id/1039510

https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2017-12069.pdf

https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-535640.pdf