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Vulnerability of SIMATIC NET PC-Software: denial of service via OPC-UA

Synthesis of the vulnerability 

An attacker can send a malicious OPC-UA packet to SIMATIC NET PC-Software, in order to trigger a denial of service.
Impacted systems: SIMATIC.
Severity of this alert: 2/4.
Creation date: 25/07/2016.
Références of this alert: CERTFR-2016-AVI-250, CVE-2016-5874, SSA-453276, VIGILANCE-VUL-20207.

Description of the vulnerability 

The SIMATIC NET PC-Software product has a service to manage received OPC-UA packets on ports 55101-55105/tcp, 4845/tcp, and 4847-4850/tcp.

However, when a malicious packet is received, a fatal error occurs.

An attacker can therefore send a malicious OPC-UA packet to SIMATIC NET PC-Software, in order to trigger a denial of service.
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This weakness bulletin impacts software or systems such as SIMATIC.

Our Vigil@nce team determined that the severity of this computer weakness is medium.

The trust level is of type confirmed by the editor, with an origin of intranet client.

An attacker with a expert ability can exploit this vulnerability announce.

Solutions for this threat 

SIMATIC NET PC-Software: version 13 SP2.
The version 13 SP2 is fixed:
  http://www.siemens.com/
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