XXE attack in Siemens products - CVE-2017-12069
Published: September 1, 2017 / Updated: September 4, 2017
Vulnerability identifier: #VU8071
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2017-12069
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Siemens
Affected software:
SIMATIC NET PC Software
SIMATIC PCS 7
Siemens SIMATIC WinCC
SIMATIC WinCC Runtime Professional
SIMATIC IT Production Suite
SIMATIC NET PC Software
SIMATIC PCS 7
Siemens SIMATIC WinCC
SIMATIC WinCC Runtime Professional
SIMATIC IT Production Suite
Detailed vulnerability description
The vulnerability allows a remote attacker to conduct XXE attack on the target system.
The weakness exists in the encryption library due to improper handling of XML External Entity (XXE) entries when parsing an XML file. A remote attacker can send specially crafted packets to the OPC Discovery Server at Port 4840/TCP and cause the system to access various resources chosen by the attacker.
Successful exploitation of the vulnerability may result in information disclosure.
The weakness exists in the encryption library due to improper handling of XML External Entity (XXE) entries when parsing an XML file. A remote attacker can send specially crafted packets to the OPC Discovery Server at Port 4840/TCP and cause the system to access various resources chosen by the attacker.
Successful exploitation of the vulnerability may result in information disclosure.
How to mitigate CVE-2017-12069
Install update from vendor's website.