High severity · published Aug 30, 2017
CVE-2017-12069
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
8.2
CVSS
2.9%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LD
Local Discovery Server · Ocpfoundation
through 1.01.333.0 · source: NVD
SP
Simatic Pcs7 · Siemens
through 8.1 · source: NVD
UN
UA .net · Ocpfoundation
through 2017-03-21 · source: NVD
WI
Wincc · Siemens
through 7.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-12069
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-12069
Third Party Advisory
http://www.securityfocus.com/bid/100559
www.securitytracker.com
http://www.securitytracker.com/id/1039510
Patch
https://opcfoundation-onlineapplications.org/faq/SecurityBulletins/OPC_Foundation_Security_Bulletin_CVE-2017-12069.pdf
Vendor Advisory
https://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-535640.pdf